Menu Close

encyclopedia

Hand Injuries and Disorders

No matter how old you are or what you do for a living, you are always using your hands. When there is something wrong with…

Head Injuries

Also called: Cranial injuries, Skull fractures, Skull injuries Chances are you’ve bumped your head before. Usually, the injury is minor because your skull is hard…

Headache

Headache is the most common form of pain. It’s a major reason people miss days at work or school or visit the doctor. The most…

Heart Attack

Each year over a million people in the U.S. have a heart attack. About half of them die. Many people have permanent heart damage or…

Heart Diseases

If you’re like most people, you think that heart disease is a problem for others. But heart disease is the number one killer in the…

Heartburn

Heartburn is a painful burning feeling in your chest or throat. It happens when stomach acid backs up into your esophagus, the tube that carries…

Herbal Medicine

An herb is a plant or plant part used for its scent, flavor, or therapeutic properties. Herbal medicines are one type of dietary supplement. They…

Herniated Disk

Also called: Bulging disk, Compressed disk, Herniated intervertebral disk, Herniated nucleus pulposus, Prolapsed disk, Ruptured disk, Slipped disk  Your backbone, or spine, is made up…

Heroin

Heroin is a white or brown powder or a black, sticky goo. It’s made from morphine, a natural substance in the seedpod of the Asian…

High Blood Pressure

Also called: Benign essential hypertension, Essential hypertension, HBP, HTN, Hypertension Blood pressure is the force of your blood pushing against the walls of your arteries.…

Hip Injuries and Disorders

Your hip is the joint where your thigh bone meets your pelvis bone. Hips are called ball-and-socket joints because the ball-like top of your thigh…

Hip Replacement

Hip replacement is surgery for people with severe hip damage. The most common cause of damage is osteoarthritis. Osteoarthritis causes pain, swelling, and reduced motion…

endocrine system

Hormones

What Are hormones? Hormones are chemical messengers produced by endocrine glands and certain cells throughout the body. They play a crucial role in regulating and…