Search Page

Osteomyelitis is an infection of the bone, often developing from a wound or after an open fracture in which the bone pokes through

Osgood-Schlatter disease is a knee problem that causes pain and swelling in the shinbone (tibia) just below the kneecap (patella)

Orthostatic hypotension is a rapid and sudden decrease in blood pressure that occurs when a person changes position, such as

An oral glucose tolerance test measures the body's ability to use glucose, a type of sugar found in fruits and many other foods.

Oppositional defiant disorder (ODD) is a pattern of hostile behavior by children and teens toward their parents or other authority

An opioid is a drug that can suppress the perception of pain and calm a person's emotional response to pain. It does this by

The foramen ovale is an opening in the part of the heart that separates the upper right and left chambers (atria). In a fetus

Obsessive-compulsive disorder (OCD) is a type of mental health condition that causes repeated unwanted thoughts. To get rid of the

Oophoritis is inflammation of an ovary (or ovaries), which occurs most often as a complication of an infection of the reproductive

An outbreak of an illness occurs when there is an increase in the number of people who live in the same area and are infected