Health and safety tips for teenagers.

Bike helmets reduce the risk of head injury by 85 percent. Helmets should fit snugly and sit flat on the head, not titled at an angle. Make sure the chinstrap fits securely and that the buckle stays fastened.To prevent fungal infections, use a foot powder daily and let the feet breathe by changing out of wet socks or wearing sandals.If your son is an athlete, make sure he doesn't ignore muscle cramps, which are an early sign of heat exhaustion. Have him rest in a cool place, drink plenty of water and stretch gently. To prevent heat exhaustion, and dehydration, he should start by drinking eight glasses of water each day. Add one to three cups per hour of exercise, depending on the intensity.Remind him to drink water throughout his work out - if he feels thirsty,he's already reached the initial stage of dehydration.Summer can make acne worse, and some acne medications are also less effective in the sun.