Normally, we lose about 100 hairs each day - old hairs fall out and are replaced with new ones. But with hair loss, hair thins at a rate that can’t be replaced. Falling hair not replaced by new ones can make a person bald or have bald patches. Hair loss can either be temporary or permanent. Changing hairstyle or shampoos used may ease the problem. But if that doesn’t help, a doctor may prescribe a drug to slow or stop hair loss and to aid hair growth. Hair is healthiest when we eat right, exercise, and protect it from too much sun.