We've come a long way in our understanding of HIV and AIDS. But there is still discrimination against people with HIV/AIDS.

Antibiotics are medicines used to kill bacteria. Over time, certain groups of these germs may adapt to these medicines. They may change in such a way that antibiotics can't kill them. This is called antibiotic resistance.

Primary ovarian insufficiency, or POI, occurs when the ovaries stop working as they should work, before the age of 40. With POI, the ovary does not release an egg each month. Learn about the symptoms and treatment of this condition.

Pelvic congestion syndrome is a condition that causes chronic pelvic pain. It is thought to be caused by problems with the veins in the pelvic area. This is the lower part of your abdomen.

An ovarian cyst is a fluid-filled sac that forms on or inside an ovary. Read on to learn about the causes and types of ovarian cysts, risk factors, symptoms, diagnosis, and treatment.

Carnitine is a natural substance that the body uses to process fats and produce energy. Carnitine deficiency is when not enough of the nutrient carnitine is available to cells in the body. Read on for details about this condition.

Aortic valve regurgitation is when a person's aortic valve leaks. The aortic valve is 1 of the heart's 4 valves. These valves help the blood flow through the heart and out to the body. Normally, the aortic valve stops blood from flowing back into the left ventricle. With aortic valve regurgitation, some blood leaks back through the valve as the heart relaxes.

A lung nodule is a small growth on the lungs.

Pubic lice are small parasitic insects. They mostly live in the genital areas of humans. Learn more about pubic lice, including cause, symptoms, and treatment.

A carotid dissection is a type of tear in 1 of your carotid arteries. It is a common cause of stroke in people younger than age 50.