Hair can also collect dust and dirt so shampoo it at least twice a week to keep it clean and healthy. Sometimes hair looks so good that little insects called head lice think it would make a nice place to raise a family. Don't feel bad if this happens to you. It's hard to avoid catching them, especially if you're with friends who don't even know they've got them but remember not to share combs and brushes with other people. You can deal with the problem by getting a special shampoo from the chemist or by combing your wet hair with a very fine comb every three to four days over two weeks.
Dandruff is something else people worry about.
It's when flakes of skin on your head fall off in larger bits than usual so that you can see them in your hair or on your shoulders. Once again, a special shampoo can usually put this right very quickly. For medical advice, or if you're worried about your health, speak with your parent or guardian, or your doctor.