For some people, chronic grinding of their teeth causes major problems. Some patients are completely unaware that they clench or grind their teeth until a check-up shows damage, says Dr Peter Alldritt of the Australian Dental Association. "Sharp teeth like canine teeth may have worn flat, crack lines may be appearing in the enamel, or fillings may be starting to crack and break." Teeth grinding medically known as bruxism can use facial pain, too. "People can wake up with a sore face or a bad headache because the muscle in the face have been activated all night while they have been clenching," he says. The ligament of the jaw joint just in front of the ear can also become very tender. If you grind during sleep, a dentist can fit you with a night guard, says Alldritt. "It's a barrier separating the upper and lower teeth so they can't come together and cause further damage." Beat the daily grind First you must realize what you're doing, says Alldr

They're less paranoid than average folk, but what they worry about (airplanes, laundry!) will surprise you. Here are the result of a survey of health experts in the US. 71% don't clean hands after touching public surfaces I'm just careful to wash my hands before eating. I didn't get a respiratory infection because I touched a door handle after a sick person touched it; I got it because I then touched my hand to my eye or nose. - Michael Pentella, PHD,    clinical associate professor,   University of lowa College of Public Health I press buttons with my knuckle especially the ground floor elevator button, because everyone touches that or I use my middle finger because I'm less likely to then touch my face with it. - Charles Gerba, PHD,   Professor of microbiology, University of Arizona 29% carry hand sanitizer I prefer soup and water. If that's not available, I'll use sanitizer but I'm not religious about carrying it. - Rima Khabbaz, MD,   director for in

Back pain prompts millions of visits to the doctor ever year. A study suggests one way to improve on your doctor's result: listen to music. Researchers from the University of Salzburg in Austria followed 65 patients with slipped discs or recent back surgery. All were given physiotherapy; half also spent 25 minutes a day listening to music while followed guided imagery relaxation exercises. After three weeks, the music listeners had pain levels much lower than the other group. The researchers did not distinguish between the effects of music and of relaxation, but a previous study found the pain relieving effect of a music only group slightly greater than that of a guided imagery only group. Music is thought to lower levels of chemicals that relay pain, says psychologist Franz Wendtner. Study subjects used a special CD. But, Wendtner says, "any relaxing music with quiet rhythm will do." Are you sitting comfortably? The slightly odd looking backstretcher chair is worth a try