Home
  MEN`S HEALTH MORE
9 ways to become a better dad
Tips for a smooth shave
Aging milestonesChanges in old age depends on attitude as much as person to person. In young old age some changes begin to take place in a person’s appearance. Wrinkles, warts, age spots begin to form on the body. Hair begins to thin or becomes grey and even height lessens because the bone density decreases. While in ‘old‘ old age these changes are already permanent. Men might look distinguished if in good health, but women all look grandmotherly. In ‘young’ old age, cells begin to decay and muscle mass declines and immunity is no longer as strong as it used to be. People lose energy as the age progresses.  ‘Old’ old age brings in a lot of physical decline, profound changes in appearance and motor abilities, as also in sensation. Skin gets less elastic and becomes thin and blood vessels can break under the skin. The senses also begin to become dull. Eye lenses get affected and color perception and reading ability becomes very low. Hearing loss may lead to paranoia and ‘old’ old age people begin to think everyone is plotting against them because they can’t hear properly about what others are saying. Sense of smell also declines, but the taste remains almost intact. In ‘young’ old age, reflexes also slow down and so do the motor abilities. By the time they reach ‘old‘ old age most adults find that their response time has become quite reduced. This can be seen most in driving situations where it is difficult for ‘old‘ old aged adults to operate their vehicles as they have poor spontaneous responses. The ‘young’ old adults do not lose as much of their motor abilities as the ‘old‘ old adults, especially when holding small things like needles and pins. Of course, there are changes in sexuality and there may be a decline in the ability to have sex as men may not have an erection and women become dry due to lack of female hormones. Cognitive decline in 40% to 60% of older adults can be arrested with remedial training. Despite all the changes, most people even in their 70s remain comparatively active if they do not suffer any illness. Mental, physical, and social activity is necessary to maintain the quality of life. Old people begin to withdraw from work and other important roles and allow the younger people to take over. They are a lot happier as is also advised in Vedic literature as vridhashram. While activities are important, disengagement is equally important. Memory loss becomes aggravated and other cognitive abilities begin to decline and there are many ‘old‘ old adults who get Alzheimer’s and lose the ability to look after themselves. Old people also dwell on questions of death and sometimes go through a phase of denial and then anger that they have so little time left. Acceptance of death comes, but after a struggle and the idea of losing the family saddens them. Old people require support in their declining years as they begin to lose their faculties.
Phimosis - Its symptoms and treatmentPhimosis is usually congenital but could be the result of an infection too. If the condition is due to repeated infection finally causing scarring and narrowing of the preputial  ring, it would rarely be called a primary and congenital anomaly. Patients with Phimosis have difficulty with voiding and ballooning of the prepuce. Balanoposthitis, which is a bacterial infection, may occur The infection of the foreskin will spread if not treated, which results in the foreskin swelling, this leads to difficulty in retracting the foreskin over the glans. Phimosis begins with an infection of the foreskin. If untreated, the infection spreads and the foreskin swells up. Signs and Symptoms of Phimosis: Red, swollen and painful Straining during passing urine Pus in the external urinary meatus Hardening and scarring of the prepuce - this is usually a late sign Odorous discharge Diagnosis and Treatment: Phimosis is diagnosed by a physical examination Antibiotics may control the infection Hot soaks may help separate the foreskin from the glans. If they fail, a small incision is made to release it. Circumcision is generally advised when the inflammation clears.
  WOMEN`S HEALTH MORE
Breast feeding problem
10 Hair secrets
Yoga to strengthen women's lifeEveryone expects from a women for all their necessities. The husband needs to go to office and she has to prepare for this, the son or daughter needs to go to school, tiffin needs to be packed, and the in-laws need her attention for the morning tea and breakfast. Along with this she has to rush to office on time. Then while returning, she has buy vegetables and other things for household, then go home and cook, and sleep late after all the chores are done. For such a multi-tasking working-women, the time available is very less to replenish the energy she uses to do such work. Multitasking leads to stress and tension and causes headaches, stiff neck, tight shoulders, poor posture, shortness of breath, clenched teeth and fatigue. What is the solution for this? The only solution is YOGA.  We all know that yoga has many positive effects on ones well-being; it brings about both physiological and psychological benefits. It is beneficial for body, mind, and spirit. It needs only 10 minutes. Yoga helps to relieve your stress and tension. Yoga in Sanskrit means 'YOG' that is to join or unite. It is the union of mind, body, spirit, and breath with our surroundings and our universe. One should start yoga gradually with a comfortable speed and limits. Breathing exercises are excellent way to reduce stress and tension. It can be done along with asanas. For this you have to sit comfortably with relaxed shoulders and with your chin level at the floor. Inhale through the nose expanding your abdomen, rib cage, then expand your chest, then begin to exhale by contracting your abdomen, ribs and then lastly relax your chest. Now continue to breath in this fashion, this improves the quality and quantity of oxygen that enters our body and helps to relieve the shortness of breath and relieves the tension. The yoga mudra is helpful to relieve the stress, for this sit down crossed legged on the mat and keep the back straight, then take the arms behind your back and hold the left wrist with the right hand. Then by exhaling, bend forward to touch your left knee, while doing this focus on the feeling of surrendering to God, which protects you all the time, then while inhaling come back to the normal position and repeat this on the right side. Then finally, complete this pose by touching the forehead to the ground in front in the centre, while doing this exhale, then when you feel like inhaling come back to the normal position. This posture increases the energy and stimulates your respiration, improves your digestion calms your nerves. But this should be avoided by pregnant women, hernia patients, and patients with retinal disorder. The shavasana also helps you to relax your body before you get to work. In this you have to lie down on your back on the mat. Keep your arms a foot away from your body and your feet separated two feet apart.  Then close your eyes and focus on your breathing and feel free of thoughts and tension. Breathe normally and focus on your body parts, toes, legs, abdomen, head and finally the scalp and try to relax each muscle group. It improves your breathing, concentration, gives inner peace. You should avoid this if you are suffering from low blood pressure.  
Menstrual crampsWhat will help to relieve the cramps? Regular physical activity like walking, running, jogging at least for an hour helps to reduce cramps in some women. Supplementing your diet with zinc and calcium has been found to reduce cramps, bloating, and related PMS symptoms. Hot fomentation with hot water bag or heating pad helps to reduce the cramps. A warm bath or aromatherapy might help. Take some deep breaths, listen to music. Relaxing and letting people around you know that you are not feeling fine will help; reduce any and every stress of your everyday life that may contribute to menstrual cramps.  
  KIDS CARE MORE
10 secrets your teenager would never want to reveal!
A ready reckoner on age - Apt diet for kids
Avoiding nappy rash - A few words of adviceNappy rash is a skin condition that takes its name from the nappy in which a baby is wrapped. It is a reddish rash, or tender skin around the buttocks and inner thighs of babies, which occurs due to prolonged wetness from either urine, or stools, or both. Nappy rash may be in the form of an unusually tender bottom on a child, or an inflammation around the genitals, and inner thighs, or folds of the skin. It generally occurs in really small babies, less than a year old. Most times, nappy rash is not a very serious condition, provided care is taken. No matter what type of nappy you use, whether promising complete dryness, or absorbent nappies, your baby is likely to develop 'nappy rash' at least once. The rash can make the baby feel uncomfortable, and cranky as a result. Steps to avoid nappy rash: Always ensure that your baby's bottom remains dry by changing nappies at regular intervals. Use a mild medicated baby soap which will help in keeping the skin around the inner thighs and buttocks soft. Give your baby some nappy free hours. You will be the best judge to know when she is likely to have comparatively dry spells, which can allow the skin and parts below the waist some breathing space. Regular bathing should take care of most rash related problems. Use an emollient, or medicated soap for bathing. Sometimes, nappy rash is a result of a thrush or yeast infection. The baby's resistance at these times is low so that it allows the yeast to thrive in the form of ugly red patches. Always show a medic to rule out the possibility of bacterial infections. Anti-fungal creams should also take care of normal nappy rashes.    
A baby - proofed guide to childcareCaring for kids is an important task. Everyone wishes to nourish kids in a loving and caring yet protective atmosphere. Initial stages of development call for more care and attention. Health, hygiene and safety at home and outside are important when it comes to kids. Here are a few helpful tips to all the parents: Nurture your infants with massage. Learn a right way or get it done from a professional. It is a great therapy to make muscles strong and bond with the baby. Prolonged crying bothers parents a lot. Usually continuous crying for long hours is suggestive of colic or stomach ache. It is the most common problem in kids, the reason being immature gastric system. Do not panic. Keep medicines at hand and give them as per instructions by your kid's doctor. Toddlers often insist on being carried even when they know how to walk well. Make sure to hold them comfortably. Diapering a baby is a skill that must be mastered especially when the baby is fidgety. Holding baby in right position flat on the back simplifies the task. Parents adapt to doing the job effortlessly with practice. Transition period of swapping from breastfeed to bottle known as weaning is a tough task for most of the babies. Consider gentle weaning strategies advised by the doctors. Do not be abrupt. Go slow! Some Safety Tips: Cap and lock the medicines, detergents, chemicals etc. in containers keeping them far away from the children. Bathingwater should be always checked before bathing the baby. Do not leave kids alone near water tub or any water source alone. Avoid leaving baby in a highchair to prevent injuries such asbaby climbing out, falling, or sliding. Lock up all the knives, matches, and plastic bags away from children to prevent poisonings, bleeding injuries, burns and suffocation.
  MENTAL HEALTH MORE
Tips for a good sleep
Eating disorders
Meditation and relaxationProcess of meditation: It entails three stages:  Concentration Meditation Enlightenment or absorption Meditation is a fantastic relaxation tool that comes for free. Today, we need relaxation because of our hectic lifestyles. In today's world the most of the people have a lot of ambitions and goals which they want to achieve as fast as possible in no time. This doesn't have to be the case because meditation not only increases energy level and efficiency but also clears the clutter of one's mind and helps accomplish one's goals with less efforts, leaving more time for the person to enjoy recreation, leisure and entertainment that life has to offer. Characteristics of Deep relaxation: When a person has a relaxation response, several physiological changes occur -  Decrease in heart rate Decrease in respiration rate Decrease in skeletal muscle tension Decrease in metabolic rate and oxygen consumption Decrease in analytic thinking Increase in skin resistance Meditating one of several activities that produce the relaxation response for 20-30 minutes a day, over time, can lead to a generalized feeling of relaxation. Benefits of Deep Relaxation are: Reduction of generalized anxiety Preventing stress from building up Increased energy and productivity Improved concentration and memory Reduction of insomnia and fatigue Increased self-confidence and reduced self-blame Increased availability of feeling
Causes and treatment of sleep talkingIt is usually believed that sleep talking is associated with dreaming, but there is no scientific evidence available to support this hypothesis. In few cases, it may be associated with sleep disorders or any other diseases. Sleep terrors and REM sleep behavior disorder (RBD) are two sleep disorders associated with sleep talking. Sleep terrors are associated with frightening scream, kicking, and thrashing. It is commonly seen in children. Awakening becomes difficult during sleep terror. Patients with RBD utter a sudden loud cry, grunt, shout, or act out their dreams, usually violently. Other causative factors of sleep walking are emotional stress, mental health illnesses, substance abuse, fever, and certain medications. Treatment: Evaluation of the patient Patients with sleep talking should be evaluated by a specialist doctor especially if it is seen in adults or associated with violent actions, screaming, or intense fear. If children with sleep talking have disturbed sleep pattern, they should be evaluated by the pediatrician. The doctor asks questions to the parents, roommates, and bed partners about the nature and the extent of sleep talking. There is no definitive treatment available for sleep talking, although the doctor may test to record the sleep pattern of the patient to identify any sleep disorder. This test is known as polysomnogram. Management Sleep talking usually does not require treatment. Avoidance of stress and plenty of sleep at night may help to decrease sleep talking. However if any sleep disorder is identified by polysomnogram, it is treated accordingly by the doctor. If underlying causes like mental illnesses, substance abuse, or medications are identified, they are also managed accordingly. Mental illnesses like depression should be treated with proper counseling and medications. The patients should refrain from alcohol, heavy meals, fatty meals, etc. The patients are advised to follow regular sleep schedule, get adequate amount of sleep, and practice proper sleep hygiene so that severity and frequency of sleep talking is decreased.
  BEAUTY AND FITNESS MORE
Summer woes - Skin troubles and remedies
Fighting obesity with tasty food: 5 Fatty foods which burn fat
How to say 'Bye' to split ends? Check out these 10 tips!One of the main reasons for split ends is the use of curling irons and other heat-induced styling treatments. When you go for hair products like hair colors or perms, the shield over your hair's shaft that protects it can get stripped off, thus making your hair liable to split ends. You could also be mechanically stressing your hair by pulling them too much while combing or combing repeatedly. Remember that rubbing your hair up towards the direction of the scalp does not lead to split ends. While there is no remedy to treat split ends, there are ways in which you can keep them away. Did you know that a medical research showed that the only way to keep split ends away is to put a stop on the excessive use of chemical on it? Hairdresser, Holly Kensen, says that split ends are the results of pushing out the natural process and pulling in too many chemicals. It is best to stay away from the styling products and embrace your natural hair! TIP 1 : Get hold of a piece of rosemary (fresh ones are the best!) and immerse them in a cup of hot water for 30 minutes. Once the temperature of the water is back to normal, whisk an egg into it. Mix this blend onto your hair. Rinse after 15 minutes using a light shampoo. TIP 2 : Bring home a ripe papaya and cut it into halves. Choose the part which you believe will be sufficient for your hair. Take off the skin and seeds. Mash it until it becomes a paste. Then, drop a cup of yogurt and stir them into a smooth paste. Apply it on your hair and let it hold for about 30 minutes. Use cold water to rinse it off. TIP 3 : Condition your hair with castor oil. Mix equal amounts of castor, almond, and olive oil and apply it on your hair generously. Wrap your hair in a towel and let it stay for 30 minutes. Then, shampoo your hair. TIP 4 : After you have shampooed your hair, apply a mix of cream and milk on them for about 20 minutes. Focus especially on the ends. Rinse your hair with cold water. TIP 5 :If you decide to trim your hair on your own, then don't use the paper scissors! They are called 'paper' scissors for a reason. Get hold of hair shears which will not leave your ends damaged. TIP 6 : Trim your hair every six to eight weeks at least up to ¼ to 1 inch. Due to our environment, it is natural for the hair to get damaged in a few weeks. It is important to remove the split ends and let them grow healthy. TIP 7 : Do not trust products which say that they can 'cure' your split ends. Split ends are not curable. They are preventable. The only thing that these products do is to seal up the splits which only makes your hair unhealthy. TIP 8 : Try to stay away from chemicals as much as you can. Chemicals only tamper with your natural hair and ruin their texture. If you really have to use it then make sure you condition them regularly. TIP 9 : Use coconut oil to fix your split ends. Buy an extra-virgin and organic coconut oil. Before washing your hair, apply about 2 spoons of the oil on your dry hair. Emphasize on the hair ends. If you want, you can steam your hair for some time (about 20 minutes). Then, wash your hair with a light shampoo and condition them. TIP 10 :This is one of the best ways to help your split ends stay away: Get hold of chamomile tea and brew it on a pot. Then pre-rinse your hair with it. After you have rinsed them, wash and condition your hair normally.
Good and bad calories-How do they affect weight loss?Not all calories are bad calories. Surprisingly very few people are aware that good calories are quintessential for burning fat and can rather help you in losing weight. So, it's very important to know how to differentiate between good calories and the bad ones. What is a Calorie? In scientific terms, one calorie equals to one unit of energy. When the term calorie is being used in relation to nutrition, it means consumption of energy through what you drink and eat and use of energy for carrying physical activity. Many people think that in nutritional terminology, calories are only associated with drink and food; but the truth of the matter is that everything has energy is calories. For example, since coal provides you energy it contains calories. 7,004,684,512 calories are equal to energy produced by 1-ton of coal. Coming back to weight loss, 100 calories of fiber and protein is not similar to 100 calories of a cake. This is because there are good and bad calories and much like us humans all calories are not equal. Calories are the measuring units of energy that are produced by the food once it reaches your body. This energy works on the law of physics and hence less energy intake leads to weight loss and vice versa. Varying types of Calories Different types of food provide varying calories or energy amount to the body. The analysis of a tightly scrutinized weight loss experiment has revealed that when people of two different groups were fed the same measure of calories albeit from varying food sources, the weight loss was almost similar. However, the effects of weight loss were variable; like uncontrolled emotions, cravings, hunger and more. This happened for the same reason that some calories are good and some calories are bad. Good and bad calories Sugar is a powerhouse of energy. But if you keep on eating only sugar all day long it will be suicidal. This is because; the calories present in the sugar are devoid of any nutrients and your body cannot function without the right balance of different minerals, nutrients and vitamins. Most food not only carry calories but they also constitute a complex mixture of additives, fiber and nutrients. These mixtures of varying components directly affect the leptin hormone that controls the hunger trigger in your body. These hormones tell the body to either burn the fat or store it. The process of weight loss is made complicated by the fact that biologically our body is programmed to protect the fat stores so that they can be utilized during starvation. So, the question remain, which calories should you eat to lose weight but still keep on getting the required amount of energy? Eating lean protein, healthy fats and unrefined and unprocessed carbohydrates such as fruits, beans and vegetables are the best for losing weight. Calories with more nutrients are the best The foods that do not store fat and make us eat again and again, are the ones you should eat as good calorie food. Choosing them is simple. These are the same food that humans used to eat before processed food was invented. For example; avoid using the processed whole grains and switch over to brown rice instead of the polished white rice. Also, stone-ground whole wheat, oats or quinoa bread is much better than the white bread. Replace the processed carbohydrates from your platter with whole grains and vegetables to lose weight, control hypertension and blood sugar. Use fats derived from plant sources such as olive oil or nut oil. Eat lean protein more such as chicken and fish.
  LIFESTYLE PROBLEMS MORE
7 tips for a healthy heart
All about cholesterol
A primer on heart attacksIndians around the world have one of the highest rates of heart diseases. Heart attack, also called as myocardial infarction, is mainly caused by a blockage that prevents oxygen-rich blood supply to your heart muscle. In other words, it is the death of the heart muscle. What causes a heart attack? When cholesterol deposition, plaques of calcium and proteins on the walls of your coronary artery cause blockage of the artery, your heart fails to receive sufficient nutrient-rich blood. This leads to the permanent death of heart muscle, and it is unable to pump the blood to your vital organs. Symptoms that signal a heart attack   Chest pain is a symptom of a heart attack.  This pain can feel like tight ache, pressure on the heart as if an elephant is sitting across the chest. However, you may get confused with the symptom chest pain - whether it is a heart attack or an angina pain. Chest pain lasts for a longer time in heart attack whereas the chest pain in angina lasts for few seconds and goes away after rest. The pain experienced during a heart attack sometimes feels like indigestion or heart burn. Other warning signs of heart attack are: Shortness of breath. Lightheadedness or fainting. Upper body discomfort in arm, the back, neck, and jaw. Nausea, vomiting, dizziness. Sleep problems or fatigue. Not every person will have the same symptoms of the heart attack. But if you have any of these warning signs, you have to act fast and get the right treatment.
All you need to know about angioplasty!Why would you need coronary angioplasty? The walls of the arteries are being constantly lined with a fatty material called plaque. This plaque increases in certain conditions like atherosclerosis. When the build-up is too high, the artery gets blocked and the subsequent tissue receives very less or no blood, causing it to die. The plaque at times may be dissolved by medicines but if it is too big, medicines prove ineffective. This is manifested outwardly as a heart attack. This is the time when the doctor would recommend the coronary angioplasty as a treatment for you. How is it done? A thin catheter with a deflated tiny balloon at one end is inserted into the affected artery. Once the exact location of plaque build-up is reached, the balloon is inflated causing the plaque to get pushed against the artery wall and creating free space for the blood to flow. A small mesh called a stent may be placed to hold the artery in place. Some stents are coated with medicines that prevent the scar tissue formation following the angioplasty procedure. The procedure may be done as an emergency or it may be planned. If it is a planned procedure: You will have to get hospitalized and stop eating or drinking 6 to 8 hrs before the procedure. Once the procedure is done, the doctor would prefer you staying in the hospital overnight to watch for any adverse events that may happen. What happens after the surgery? The surgery lasts for 1 to 2 hours and you would be allowed to go home the next day. You will be advised not to undergo vigorous and strenuous exercises and to rest adequately. Most people are fit to return to work a week after the surgery.
  Sexual Health MORE
5 exercises for great sex
5 Benefits of masturbation
Are long hours of work bad for your sex life?As researchers in 'Occupational Health' indicate that working more than 8 hours a day could seriously shorten your life span by inviting all sorts of ailments like heart disease, sleep deprivation, chronic fatigue syndrome among others, it could very well mean sounding the death knell on your love life! So how does work affect play? The stress that goes with long work hours could certainly lower sex drive leading to feelings of frustration and inadequacy amongst partners. 'Erectile dysfunction' and lack of sexual desire are now on the increase amongst men with high pressure jobs and fancy designations. This in turn adds more strain on the relationship as partners naturally feel spurned due to the general lack of intimacy and sex. There is also the added danger of extra marital affairs as hours away from home can increase the chances of one night stands or casual sex thereby increasing the risk of STDs and sexual guilt which can only spell doom on the home front. So if you are a busy person this is what you can do to keep your bed from crumbling: Take a break now and again from work to call your spouse or partner. This can indicate that though you are busy he/she is foremost on your mind. Do not sacrifice your weekly offs as this is the time that your body, mind and spirit need all the healing that they could possibly get at the hands of your mate. Try and involve your mate as much as possible on what is happening at the work place. This way your contribution at your work place can be appreciated and can lessen the grouse, somewhat, like you are never available and similar other complaints. Preferably keep time for making love. These moments of intimacy are really what makes life worth living and should be given as much prominence as your promotions and annual appraisal. Do not miss out on your meals and exercise routine that ensure that despite hectic work pressures, you can still summon up enough energy to make love. Try a relationship counsellor to help you fine tune your work schedule to your home life.  
How to talk about STDsThese are dangerous times that we live in. Just the sheer number of people affected by sex related problems, diseases and conditions all over the world is simply terrifying. AIDS, venereal infections like syphilis and gonorrhea, herpes, HPV etc. are rampant and it calls for some responsible sexual behavior. However, that's a utopian world where humans will be monogamous and will behave responsibly. Even single people might get exposed to these diseases through indulging in risky sexual contact. Imagine doling out $750,000, as a woman in the US got from her husband because he gave her herpes. Even if you are not held legally accountable, what about moral responsibility to own up and discuss a possible STD infection with your partner! Take the case of Jack a happily married man for ten years who had casual sex when out of town on an official trip. He showed no obvious symptoms of any infection but in a month, his wife showed signs of herpes and his marriage crumbled as his wife struggled to come to terms with her husband's obvious infidelity and his callous manner in exposing her to a serious sexual infection. Call it ignorance but sometimes a person might engage in sexual intercourse and contract a disease which he might even not be aware of until the symptoms start appearing. (Refer article on Syphilis on www.topdoctorsonline.com) By then, he might have, in all probability, passed it on to his regular sexual partner or spouse. Or perhaps, there is another possibility that the person knows that he has contracted a sexual infection but doesn't know how to break the news to his partner.  If a person is aware of his infection, yet exposes another person knowingly, it is akin to premeditated murder. Yes, it is going to be a difficult thing to tell your partner which might even signal the end of the relationship or cause severe strain on it. So, if you are caught in a situation like this, what would you do? The option would be to visit a sex therapist and confide in him and then take an appointment for both and let the professional break it to the partner. That is of course if you are in a stable relationship. For those who both party to casual sex, the infected person generally won't be that open about his infection and may even choose not to care particularly if the other person is a complete stranger. A report in MedlinePlus news reveals some more shocking statistics: Many people said they occasionally, rarely or never got tested before having sex with casual partners (50 percent) or long-term partners (39 percent). Of the people who did discuss STD testing, very few discussed concurrent sexual partners or when partners' testing occurred in relation to their last sex act. Only half explained what types of STDs their partner had been tested for. These issues are important components of assessing STD risk, the researchers said. About one-third of participants reported telling a partner they didn't have an STD even though they hadn't been tested since their last sexual partner. One U.S. woman was awarded $750,000 in court from her ex-husband because he gave her herpes, and the legal trend is to make people accountable. (http://www.dummies.com/how-to/content/how-to-talk-to-a-partner-about-stds.html) Remember even wearing a condom is not a 100% guarantee that the infection won't pass on to the other person but that's the least that you can do if you don't have the courage to spill the beans about your condition. If you feel that your partner may be indulging in sexual activity with multiple partners and if you feel he might be infected, then you are well within your rights to decline to have sex with him until he/she gets tested. If you notice sores around the genitals do not indulge in oral or anal sex or any kind of sex and insist on a condom always; it could save your life.
  PHOTO STORIES MORE
  VIDEOS MORE
FAQS
T&C FAQS