| Hair Loss Hair loss is believed to be primarily caused by a combination of factors, including aging, changing hormones, illness, and family history. |
| Hair Problems Detailed information on hair problems, including baldness (alopecia), excessive hairiness (hirsutism), and ingrown hairs |
| Hair Replacement Surgery Detailed information on hair loss and hair replacement surgery |
| Halitosis (Bad Breath) Detailed information on halitosis (bad breath), including causes and treatment |
| Hand Pain and Problems Common hand problems include arthritis, carpal tunnel syndrome, and ganglion cysts. |
| Hand Surgery Detailed information on hand surgery for different hand conditions |
| Hand Washing Use warm water to wet your hands, then apply soap. Rub your hands together for at least 10 seconds. Rinse thoroughly to remove all soap. |
| Hashimoto's Thyroiditis Detailed information on Hashimoto's thyroiditis, including symptoms, diagnosis, and treatment |
| Head Injury in Children The more common causes of head injury in children are falls, motor vehicle accidents—in which the child is either a passenger or a pedestrian—or a result of child abuse. |
| Headache Headaches vary greatly in terms of pain location, pain intensity, and how frequently they occur. |