Rare, deadly, and often missed, some skin cancers develop in areas that rarely see the sun. Scientists are still learning about them, but here's what we know.

June 19, 2025 – The FDA has approved the first twice-yearly shot to reduce the risk of HIV infections.

A painful sore throat is a signature symptom of an Omicron subvariant called NB.1.8.1, or Nimbus. It now makes up about a third of U.S. COVID-19 cases. Find out what you can do to get relief.

Chlorine Uses The main use for chlorine is as a disinfectant, to sanitize water and industrial wastes. It’s also an ingredient in many cleaning products you use at home.

There are serious GI side effects of Ozempic, including nausea, diarrhea, and more. Learn what this drug does to your body and how to manage side effects.

Pushups and step count are a byproduct, not a definition, of fitness. It’s not even about your “why.” Dig deeper for your ...

Hypothalamus Functions Like the thermostat in your house works to keep the temperature stable, your hypothalamus's job is to keep your body in a stable state called homeostasis. Homeostasis is ...

Black Mold Symptoms Mold can cause your immune system to react. This is most likely to happen if you're allergic to mold, exposed to large quantities, or for long periods. An example is farmers ...

Learn what early satiety is, why you feel full after eating little, its causes, symptoms, and treatments—and what it could mean for your health.

Get all the information you need on vitamins and supplements, from A to Z, with WebMD's comprehensive database. Our expert resources cover everything from health benefits to potential side effects ...

Whey is a byproduct of the cheese-making process. Manufacturers use enzymes to curdle cow’s milk, separating out its solid curds and leaving liquid whey. The curds, composed of milk fat, are ...

A landmark 1976 U.S. Supreme Court ruling (Estelle v. Gamble) makes incarcerated people the only group in the United States with a protected constitutional right to health care. But the exact ...