Home
  MEN`S HEALTH MORE
Tips for a smooth shave
Can a man be depressed?
Too much of these can be detrimental to healthModeration is the mantra for everything in life. There are a lot of things in our daily life that we do. Excess of these can be detrimental for your health. Let's see how: Television, Laptop, Mobile: That screen is torture for your eyes. Looking at the TV/ laptop/ mobile screen for too long can cause dryness of the eyes. It also makes the mind dull and inactive. Even though you have not done anything much, you feel tired. It is also unhealthy for your social and personal life. Gadgets are meant to add convenience to your life, and not alienate you from real people. These also lead to sedentary lifestyle which further triggers obesity, hypertension, diabetes and other chronic ailments. Travelling: Many of us travel for work, for education. Frequent meetings are a part of work life. Some like to holiday a lot. But too much traveling upsets routine for the body. It changes schedules too often, adds new stressors to an ordinary day. Food options also get limited and sleeping patterns are influenced. If your job demands excessive travel, make sure you consciously put an effort to choose a healthy lifestyle when away from home. Worrying: Worry is unavoidable. Think of a day you did not worry about anything, isn't it difficult? Normal stress is a part of life, but if you are worrying too much, you are weakening your immune system in more ways than one. It makes you weak, susceptible to infections, prone to lifestyle diseases, and also affects your social life and relationships. Vitamin supplements: Supplements are not your daily diet. Have them in moderation and with due consultation from a doctor. Some vitamins get stored in the body when taken in excess quantities. This can result in condition called as hypervitaminosis and various health problems. Exercise: Body is not a mechanical machine that can keep functioning at the click of a switch. Even a machine needs oiling and repairs. If you love to exercise, that's great. But don't do it all day. Too much physical exercise is strain on the body. It can lead to muscle exhaustion, weakness, breakdown and may even damage the kidneys. Sleeping: Sleeping is the rest the body needs but too much of rest means rusting. Oversleeping makes you dull and may even trigger your migraines. It annoys the body clock and may create metabolic disturbances Social Networking: This is not good for your mental health. Those two hundred friends who like and comment are not your world; the one whom you call when you want to cry is your friend. Posting images and sharing updates on social media is fine, but it is more important to talk to those who live with you, who are physically around. Many peer pressures and image issues also arise from excessive social networking and people may tend to live in a 'make believe' world.
The moody man - Mood swings in menMen, such jokes on a woman's monthly mood swings are passe. Recent research proves that men are equally prone to have mood swings. Have you experienced a myriad of emotions? Angry, irritated, feeling helpless, self-pity, an irrational urge to throw things and cry and be depressed all at the same time? These are signs of mood swings. And the point of interest here is that you don't have to be a woman to experience mood swings. Men face their share of mood swings too! Men undergo hormonal influence too. And like women this causes them too to be irritable and cranky. The difference here is that the hormonal fluctuations are not as severe in men as in women. So the mood change lasts for a lesser time compared to a woman. Men's moods are also affected by psychological and physiological stressors. So a man who has to work against time to meet a deadline will be very irritable. A man who is deprived of sleep will end up snapping at you for no apparent reason. The myth that men don't cry, is something that men take to heart. Men are emotional beings and it is okay to show some of the emotions. The male stereotypical image is such that if a man is expressive of his emotional side, he isn't considered macho enough. Hence men tend to internalize their emotions and feelings. Often this leads to chronic depression. Taming the mood swings. Any form of physical exercise helps keep the mood in balance. This helps in keeping the aggressiveness under check. Sex is also a great way to release the stress and feel better, rather than snapping and using profanities. Another helpful way is to ask yourself 'why'. Whenever you feel that you are doing something irrational or out of character, ask yourself why. The answer you get from yourself will help clear the situation and you will end up handling it in a mature fashion. The irritable male syndrome. This is the male equivalent of the female menopause - The Andropause. It covers the symptoms seen in middle-aged men that occur due to the drop in testosterone levels. Like women, men show mood changes, bouts of irritability, grumpiness, hypersensitivity, anxiety and frustration. The recent research on men having mood swings and the society's acceptance of these findings is very encouraging. It helps stress in the fact that men are emotional too. There is nothing anti-macho about a man crying his heart out at times. It only shows he is human, after all.
  WOMEN`S HEALTH MORE
Excellent exercise options during pregnancy
Tips to prevent osteoporosis in women
10 pregnancy risk factors that every pregnant woman should be aware ofFollowing are the possible risk factors for pregnant women: Hypertension: Blood pressure rises during pregnancy due to changes in osmotic level. Persistent high blood pressure leads to a condition called as pre-eclampsia. It retards the growth of the baby in the womb and can even result into death of foetus. It can lead to convulsions in mother. Exposure to medicines and drugs: Self medication is a strict NO NO during pregnancy. Certain drugs have harmful effect on the growth and development of baby. Take gynaecologist's opinion and ask a doctor before taking any medication.  Smoking: Smoking retards the growth of foetus (baby in womb). Moms who indulge in smoking give birth to babies with a very low birth weight. It also increases chances of miscarriage. Mother's weight: It is important to make sure that there is a steady weight gain during pregnancy. A weight gain of 11 kilograms is expected over a period of 9 months. Watch for a steady weight gain for a healthy pregnancy sake. Anaemia: There is an increase in blood volume during pregnancy. This can cause the iron levels to drop down resulting in anaemia. Haemorrhoids add further to the iron loss. Iron and folic acid are therefore prescribed. Haemorrhoids: Haemorrhoids are common during pregnancy and after pregnancy due to constipation which is because of hormone induced reduced motility of intestine. The pressure of gravid uterus on intestine may also cause it. Increased consumption of green leafy vegetables and laxative would relieve it. Alcohol: Drinking can cause a harmful effect on the growth and nourishment of child. Child may be born with a serious medical problem. Sexual intercourse: It's strictly not advised during last trimester. Radiation exposure: Exposure to radiotherapy or chemicals in the surrounding should be avoided. Bleeding per vagina: Consult your gynaecologist soon, if you have problem of bleeding per vagina. It could be a sign of abortion.  
Mammary duct ectasiaSigns and Symptoms In most of the cases, female patients do not have any symptom. In few cases, women may present with nipple discharge, tenderness or inflammation of the surrounding region. In some cases, there may be a lump over the breast or the nipple may get inverted. Causes Exact cause of mammary duct ectasia is unknown. But few possible cause or risk factors have been proposed by the doctors : Increasing age - Probability of developing mammary duct ectasia increases with age. With ageing, the breast changes its nature. Glandular tissue is replaced by fatty tissue. This change may lead to duct ectasia. Smoking- Milk ducts are widened due to smoking. This increases risk of inflammation which may lead to duct Ectasia. Inverted nipple - Inverted nipple obstructs the milk duct. It may lead to inflammation followed by duct ectasia. Complications Complications of duct ectasia may be may be of varying severity. They are usually minor, but sometimes become serious. Localized discomfort- Discomfort occurs due to pain and swelling around the nipple. Nipple discharge - Ectasia is frequently associated with discharge of thick and sticky fluid from nipple. Infection- Bacterial infection may develop due to stagnation of fluid in the milk duct. If it is neglected, it may lead to localized collection of pus known as abscess. Abscess requires surgical treatment. Abscess is drained surgically. Diagnosis The doctor usually diagnoses duct ectasia by clinical examination. However, few investigations may be required. Mammography- X-ray of the breast tissue is known as mammography. It helps the doctor to evaluate the breast tissue. Ultrasound- Ultrasound enables the doctor to evaluate milk ducts beneath the nipple. Treatment Duct ectasia is usually relieved by treatment. Following are the treatment options : Medications: The doctor prescribes antibiotic therapy for 10 to 14 days. It may be accompanied by mild painkillers like ibuprofen, etc. for initial few days till the remission of the disease sets in. Most of the cases are usually relieved by medications. Surgery: If duct ectasia is not controlled with medications then the doctor chooses to remove the duct ectasia surgically. Surgery is required very rarely.  Self care measures Following self-care measures often provides relief to the patients. These remedies can be adopted at home. The patient may wear a breast pad or support bra. The patient may apply warm compression to the affected region. The patient must stop smoking. The patient may be advised to sleep on the opposite side of the affected breast. Female patients should be educated regarding mammary duct ectasia so that they can detect possible symptoms of duct ectasia themselves. This will help to prevent possible complications of mammary duct ectasia and early diagnosis will provide early cure.
  KIDS CARE MORE
Child care - Watch out for these signs and symptoms
Tips to maintain good personal hygiene in children
Anger management for your teenaged daughter - Handling difficult teenage times If one fine day you find your daughter suddenly reacting differently to a particular situation, do not be surprised, especially if she is in her teens. The outburst is beyond her control and she herself is confused by her own behavior, at times. It's important rather than scolding her for her misbehavior, one must wait for her to calm down and then speak to her regarding the incident when she is in a jolly mood. It is impossible to forgive such behavior if it repeats regularly, though. Here are some ways to deal with your daughter if she strays the limits of accepted norm for a behavior. You can seek the help of a counselor and understand why this is happening and solve her queries so that she could handle them better in the future. Why do Teenage Girls Lose Temper?By the time, the girls enter their teens they would have become aware about the social etiquettes, importance of looks, acting in an acceptable manner in social scenarios and creating a 'cool' image about themselves when they are outside their homes. So, even if they are hurt, or are angry at something, they do not let it go public, lest their 'cool' image gets shattered. However, the same anger becomes bottled up and vents itself out when they reach home. It's much like the workplace anger showing up at home. This is the place where they can behave wildly and still expect forgiveness. However, that does not mean that you should let your daughter get away with such kind of madness. After she has cooled down, you need to talk to her to find out what is bothering her or making her behave in such a manner. Probably, she may not accept that she has a problem, but you will have to find a way to reach to the root of the issue. More often girls want to be like someone in their college or peer group. They want to fit into a particular group and being unable to do so makes them nervous and distraught. Teach your daughter to believe in herself. Make her understand that she is a unique person on her own and do not need to convert herself into someone else. It may take consistent effort on your part to imbibe all these things into her mind, but you have to work hard to make her understand. Self-Control is the KeyMany young girls do not know how to solve a particular problem when they are faced with it. Apart from taking her to a good counselor, you can discuss problem solving techniques with her. Ask her to understand the situation first, put a foot backwards, relax, and then find a solution to the problem. This habit will make her probe into the problem in a better way and she will be able to handle similar situations when they occur again. You can ask her to write down the problems that are bothering her and ponder over them. You can assist her initially, but as she matures she will find her own solutions depending on her past experiences. Adolescent girls have sometimes trouble keeping their anger, rage, and fear under control and hence their problems should be handled patiently. Brainstorming SolutionsOnce she has ripped apart every aspect of the problem and has come to a brainstorming solution, advise her to write down the plan of action. For example, if she is disturbed due to a particular teacher who does not seem to like her grades, she may do well seeking help through friends who are better in that subject, or for that matter, a bad remark by someone in a group might unsettle her, thereby venting her anger at home. With restraint on your part, make her understand that anger will only block her process to think or find a solution. If you teach her to find answers for the problems in a calm manner, your teenage daughter will surely learn to control her anger and behave normally as she grows into an adult.
Colic among newborns - The riskBaby colic is very common among newborn. What causes the colic? Ingestion of air while breastfeeding. Baby sucking too fast might lead to gastrointestinal pain. Foods eaten by the mother is claimed to upset the immature baby's tummy. Here are some tips to deal with the crying baby: Holding or rocking it in arms can do the trick. Singing a lullaby is effective to put the baby to sleep. Burp the baby every time after breastfeeding. Hunger is expressed by crying. Breastfeed. Loud noises might startle the baby. Prevent making loud sounds. A warm bath soothes some babies. Pacifier does wonders for some babies. Gas pains can be the cause. Use the medicine given by doctor as per his advice. Moms should make changes to what they eat.
  MENTAL HEALTH MORE
15 Things you should do daily to keep stress away
Tips for a good sleep
The male ego: Fragile male self-esteemIn a world where men are constantly competing with one another, adding a woman to this dynamic changes the perception for majority of men. The fact that a woman is doing better than a man can largely affect relationships at a personal and professional level. Simple things like opening a door for men or even pulling a chair for him can make him feel self-insufficient. The whole concept of a woman doing something/anything better than him brings down his self-esteem. In a relationship the roots go deeper and men who are making less money or not doing as well as their partners have a more fragile self-esteem. The mental insecurity that a woman may be a better provider for the family and has more potential than he does, changes the dynamic of his relationship, while for women this does not seem to be the case. Fragile self-esteem alters your everyday determination and persistence. Without being determined, the only way to go is downwards. When self-esteem is affected by women doing things that he can do, men seem to take it in a negative manner and lower their self-esteem. Small examples of this in our day to day life are - driving your own car as compared to having a driver, being physically weaker than a woman, etc. Men are creating rules to ensure that women who are considered lower than them cannot perform or do better than them. Systems and frameworks are made which ensure that situations never come up where a "lower person" does better than a man can, all out of the fear that they can't perform! From the day we are born to the rest of our lives, we are drilled with the fact that men are better, stronger, and smarter than women. So when situations arise where she is doing or has done better than you, the male self-esteem is questioned and, most of the time, drops. Being the person you are meant to be, you would automatically create a system by your choice and influence it to reduce the possibility of any other to be able to achieve what you have, in turn increasing your self-esteem. However, when the other overcomes or surpasses this obstacle, your self-esteem will be hit hard causing a drop in your self-esteem like the stock exchange does on its bad days. Self-esteem is a very personal topic and completely dependent on the situations you have encountered across your life. However, when majority of these are leaning in one direction then there is no question of failure. Consider a world dominated by women, What would happen to your self-esteem? Do you think you would survive in this kind of world, a world in which all your thoughts are limited by restrictions and rules you have to adhere too, to ensure things like your family name is kept out of shame. So let us all do as the women have been doing for centuries, embrace it, and learn to maintain our self-preservation and esteem irrespective of our surroundings. This may sound hard but let us work towards a world where women and men are equal. Don't let your self-esteem be affected by your surroundings, if you know your surroundings are not the best for the future.
Mood disordersMood disorder is a category of mental health problems, and it includes all types of depression and bipolar disorder. The cause of mood disorder is not well known. Endorphins in brain are responsible for positive moods. The neurotransmitters regulate endorphins. Depression and other mood disorders are caused by a chemical imbalance in the brain. Life events such as unwanted changes in life may also contribute to a depressed mood. Mood disorders are inherited. Children, adolescents, or adults who have a parent with a mood disorder have a greater chance of also having a mood disorder. Symptoms: Prolonged feeling of sadness Helpless feeling Low self-esteem Intense guilt Suicidal thoughts Loss of interest in daily activities Difficulty with relationships Disturbed sleep Change in appetite or weight Low energy Inability in concentrating Inability to make decisions Frequent physical complaints (i.e., headache, stomach ache, fatigue) Threats of running away from home Hypersensitivity to failure or rejection Irritability Aggressive behaviour Hostility In mood disorders, these feelings appear more intense than what a person may normally feel from time to time. Treatment Psychotherapy: It is focused on changing the individual's distorted views of themselves and the environment around them, working through difficult relationships, and identifying stress triggers in their environment and how to avoid them. Family therapy: Families play a vital supportive role in any treatment process. Antidepressant medications: Medications in combination with psychotherapy has shown to be very effective in the treatment of depression.
  BEAUTY AND FITNESS MORE
Summer woes - Skin troubles and remedies
Milk - Which type suits you best?
Why the world does yoga?This ancient science is beneficial for ages to mankind. The health benefits of yoga have been even accepted by modern medicine across the globe. Here are some life-improving benefits of yoga: Yoga helps carve a strong and healthy body. Deep breathing and relaxing exercises help to keep mind calm, focusedand sharp. It helps balance our nervous system,improves our brain function and consequently all bodily functions. It helps release tension and calms your mind. We can't be creative when we are stressed. Yoga relieves stress and improves creativity. It helps to prevent and treat various health conditions like hypertension, diabetes, obesity and improves overall immunity.  
High heels can walk you to the hospital bedHigh heels make a fashion statement which makes us look tall, elegant and good but they cause injuries on a regular basis. High heel shoes have been luxury item once upon a time; today high heels have made themselves a part of every girl's life thanks to supermodels and stars. You will not find any health warning on shoes but they ought to, as they seriously put you at a high risk of numerous health problems. How are high heels and low back painrelated? High heels significantly affect your natural posture and your spine. The natural arch of spine becomes acute when walking in high heels. This poses high risk to the spine getting injured. This not only wears  and tears intervertebral cushions called discs but cause injury to the nerves too.  High heels put strain on muscles of lower back causing pain after a long day of wearing high heels. Nerve trapping, nerve pain and radiculopathy can result from wearing high heels for a long period. This is exhibited     as tingling, numbnessand pain. Arthritis, nerve pain, hammer toes, ingrown toenails and bunions are all common problems due to high heels. Calf muscle shortens and tightens after prolonged use. Jogging, playing, running with high-heeled shoes can tear and rupture calf muscles. What can you do to prevent damage? Firstly ensure your body is in top shape before you start. There is a much less chance of developing low back pain if you are strong and fit. So do activities like swimming, pilates, circuit class, box-exercise and whatever else thatmakes you feel good. Focus on activities that make the abdominal area strong includingyour deep core muscles. Secondly a regular regime of stretching will prevent a lot of problems occurring. Either get involved in a yoga class or make sure you do 10-15 minutes of stretching every day. Stretch your back, your calves and hamstrings especially. Thirdly get sports massage at leastonce-a-month. This will loosen the tightened structures, realign the spine and lengthen the hamstrings, calves and Achillestendon
  LIFESTYLE PROBLEMS MORE
Factors that can trigger allergy attack at home
Common causes behind the bloated belly with tips to beat the bloating
How to communicate with a patient who has a strokeThe first and the most important thing to communicate with the patient, is to give undivided attention. Give attention to his activities, gestures, his facial expressions through which he may try to communicate so his feelings could be understood. Eye contact is also important but the patient having stroke may look at you square in the eyes but he may not respond to your conversation. While communicating with the patient you should always stand in front and tune out all the other sights and sounds in the room. Maintain full silence around the patient in the room, turn down the volume of the television, radio and ask other people in the room to be silent. You may communicate with the patient by making contact by touching the hand, chin, cheek or areas which are not affected by stroke. As the side which is affected by stroke, does not have any sensations. You may communicate with the patient through his family member by telling the family member to communicate with patient by saying, "Look at my face"; through this we can gain the patient's concentration. You should always speak clearly with the patient in a normal soft volume. Express your ideas in simple terms, form simple sentences, do not use complex words. You may repeat the sentences or an important term again. For example to ask if the patient wants tea, repeat the word 'tea'. More complex thoughts can also be similarly conveyed and repeated. You may also use hand gestures with clarification like doing Hello by waving your hand or through your hand action, you may ask questions like, How are you? Are you ok? What do you want? Through this both caregiver and stroke patient can benefit. You may ask your patient to point out whatever he wants or if he needs anything. And gradually he will develop the habit of pointing the daily items like television, newspaper, remote, eyeglasses radio, drapes an uncomfortable foot, the patient can indicate any pain or headache. Through this communication we can make the patient learn, use mechanical lifts to get in and out of the bed, and with the help of the attendant by demonstrating the patient how to use it. Sometimes when the communication does not work, take a break, give it time and try again, do not get frustrated and reassure the patient that yes, he or she can do it. Good communication with the patient is very important as they cannot speak their basic wants and needs clearly. The patients suffered a stroke also have slurred speech. There is a deviation of the angle of mouth. They are mostly bed ridden and could not carry out the routine activities.
Hypertension and Vitamin DVitamin D is one of the essential vitamins that are required for strong and healthy bones. The body synthesizes it in the skin from cholesterol when there is adequate exposure to sunlight. Over the past decade, vitamin D has been intriguing medical researchers the world over. Several studies were conducted and interesting results found. One of them being that vitamin D may be implicated in influencing blood pressure levels. As per studies conducted, it was found that low levels of vitamin D lead to high blood pressure levels. People living in high altitudes where sunlight is at a minimum level were found to be hypertensive. Also, the winter season showed an increase in hypertension cases which was again attributed to the low sunlight levels. What exactly does vitamin D do to affect the blood pressure? Renin is an enzyme secreted by the kidneys that constricts the blood vessels and increases the blood pressure. Vitamin D acts by inhibiting this renin. Insulin resistance causes high blood pressure, which is why hypertension often has co-morbidity with diabetes mellitus. Vitamin D helps in improving the body's sensitivity to insulin. Calcium deposits on the arterial walls harden them and make them lose their elasticity leading to an increase in the pressure of blood flowing through them. Vitamin D helps the body to better absorb and metabolize the calcium. The role of vitamin D in strengthening bones is very clear. Though the studies have shown that people having deficiency in vitamin D tend to develop hypertension, the role of vitamin D in this case is still not very clear. Also, whether vitamin D supplements help in lowering blood pressure levels is still to be found out! But all said and done, the research findings cannot be ignored. Moreover, a morning walk is beneficial in many other ways as well! So, get up early, put on your walking shoes and say Hello to the sun! Vitamin D alone will not help you control your BP. You need to keep taking the medications along with the other dietary and life-style changes! An early morning walk is a blessing for the whole day!
  Sexual Health MORE
12 foods which are pulling down your sexual drive
Spice up your sex life - Aphrodisiacs at home
Pulling out - Is it an effective option for contraception?What is the 'Pulling out' method? 'Pulling out', 'Withdrawal' and 'Coitus Interruptus' are all the different names for probably one of the safest methods of contraception. It involves the male partner withdrawing or pulling out his penis just before ejaculation. This ensures that no semen has been ejaculated into the vagina or vulva of the female partner. Since there are no sperms travelling inside, the result is - No Pregnancy! Is this method really effective? Like all methods of contraception, the effectiveness of the pulling out method also depends on how correctly it is done. This method requires a lot of mutual understanding between the partners. The male partner must also exercise great self-control and accuracy in knowing when he will reach the highest point of sexual excitement so he can pull out at the right moment. Statistics have the following things to say Of women whose partners use withdrawal, 4% become pregnant each year if they always do it correctly, and 27% become pregnant each year if they don't always do it correctly. Ejaculating close to the vagina or vulva would mean that the sperms still have a way to travel inside the vagina. At times the pre-ejaculate fluid may also contain a few sperms from the previous ejaculation that may end up causing pregnancy. As a precaution against this, experts suggest the male partner pass urine before the sexual act. Withdrawal method of contraception is the best option for members of religious groups in which using contraceptive devices like pills, condoms or IUDs are a form of sin. Withdrawal method does not protect you from HIV/AIDS and other STDs. What are the advantages and disadvantages of this method? Advantages It is simple, safe and convenient. It is the best method when no other contraceptive method is available. It has no side-effects It does not require a medical prescription. It does not alter the menstrual cycle. It does not affect future fertility. Disadvantages Requires great self-control, experience and trust. Not suitable for men who suffer from premature ejaculation Not suitable for teenagers and sexually inexperienced people. Does not ensure protection from sexually transmitted diseases and HIV/AIDS. Less effective than other methods of birth control. May interfere with sexual pleasure due to nervousness and anticipation of pulling out at the right time. The pull out method is thus one of the safest methods of contraception, provided one has a thorough understanding of one's body, trust in the partner and a huge amount of self-control.
Smoking causes impotence!Men who smoke heavily are twice as likely to suffer from impotence or erectile dysfunction. The link between smoking and ED has been established beyond reasonable doubt. Smoking causes a hardening of the arteries or blood vessels. For a penis to grow erect or tumescent there has to be a healthy blood supply. Now imagine the cross-section of a smoker's penis where there are plenty of blockages and hardening of the blood vessels. Can the penis then grow erect with so many hindrances to the blood? There is also an acute loss of sensitivity to the penis which is a direct contribution of smoking! Previously, alcohol was a hot favorite of the medical lobby when it came to 'impotence.' Wish smokers could say the same thing about moderate smoking! Even moderate smoking can make an existing condition of impotence worse. One could make changes to one's lifestyle and diet and curb stress to treat ED (erectile dysfunction), but all these will come to naught unless one really resolves to give up smoking permanently. Just within a few hours of kicking the butt, the body starts to repair itself. Of course, it may take longer for the blood vessels to actually undo the blockages and have a free run for the penis, but it will certainly happen, slowly and surely. Smokers may have an underlying condition of anxiety, which is made worse by nicotine, which in turn causes performance anxiety, not greatly helped by blocked blood arteries. So smoking not just makes you physically impotent, but also mentally impotent too. It is a powerful narcotic which is hateful to the body and spiteful to its salubrity. Please enroll into a 'stop smoking now' campaign with the help of friends or family. Check for any 'nicotine anonymous' programs in your neighborhood or just do it all by yourself. Otherwise, the only thing hard about your penis will be hardened arteries and lots of hard luck!
  PHOTO STORIES MORE
  VIDEOS MORE
FAQS
T&C FAQS