Acanthosis nigricans is a skin condition that appears as dark, thick patches on the skin. Learn more about this condition, including causes, symptoms, and treatment.

Zika is a virus spread through the bite of a mosquito. It may also be passed on through sexual contact and blood transfusions.

Yersiniosis is a foodborne illness. It causes inflammation in the small intestine and colon. It is more common in children.

Tinea unguium is a type of fungal infection. The fungus infects the fingernails and, more commonly, the toenails. It's more common in men, older adults, and people who have diabetes or peripheral vascular disease.

Tinea cruris is a type of fungal infection. The fungus infects the skin in the groin. It is more commonly called jock itch.

Shigellosis is a digestive illness caused by bacteria. You can get it by eating or drinking contaminated food or water.

An intrathecal pain pump implant is a way to relieve some kinds of long-term pain or cancer pain. It sends pain medicine through a thin, flexible tube. The tube is inserted into the space around the spinal cord.

A gallium scan is an imaging test. It is done to look for inflammation, infection, or cancer in your body.

Infection may occur after a joint replacement. To treat it, antibiotics may be sent directly into the joint through a catheter. The catheter stays in place for several weeks.

Infectious tenosynovitis is an infection of a tendon and its protective sheath. This infection is most common in the finger, hand, or wrist, and it needs quick treatment to prevent permanent damage.