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An ingrown nail grows into the flesh instead of over it and usually affects the toes, particularly the big toe. The site of an

An intraductal papilloma is a noncancerous (benign) small growth inside a milk duct in the breast. It may appear on the skin near

The intestine (bowel) is the long, winding, tube that is part of the digestive tract. The intestine helps to process food, extract

Insulin resistance is a condition in which body cells do not fully respond to the action of insulin, a hormone that controls the

Insulin is a hormone produced in the pancreas that allows sugar (glucose) to enter body cells, where it is used for energy. It

An inhaler is a handheld device that delivers medicine in a measured dose while a person inhales. Inhalers are used in respiratory

Intussusception is a condition in which part of the intestine folds inward and into itself (like a telescope), usually causing

An incarcerated hernia is a part of the intestine or abdominal tissue that becomes trapped in the sac of a hernia—the bulge of

The inguinal canal is a natural passage or opening through the muscles of the abdominal (belly) wall. Before babies are born, the

Influenza (flu) is an infection, caused by a virus, that makes you feel very sick, often with fever, headache, body aches, and