Overview Nickel allergy is a common cause of allergic contact dermatitis — an itchy rash that appears where your skin...

A heart attack, also known as myocardial infarction, occurs when the blood flow to a part of the heart is...

Overview Lip cancer occurs on the skin of the lips. Lip cancer can occur anywhere along the upper or lower...

Overview Encopresis, sometimes called fecal incontinence, is the repeated passing of stool (usually involuntarily) into clothing. Typically it happens when...

Overview Optic neuritis occurs when swelling (inflammation) damages the optic nerve — a bundle of nerve fibers that transmits visual...

Overview Chronic pelvic pain is pain in the area below your bellybutton and between your hips that lasts six months...

Overview Fibrocystic breasts are composed of tissue that feels lumpy or rope-like in texture. Doctors call this tissue as nodular...

What is arteriovenous malformation? An arteriovenous malformation is an abnormal tangle of blood vessels connecting arteries and veins, which disrupts...

What is narcissistic personality disorder? Narcissistic personality disorder — one of several types of personality disorders — is a mental...

Overview Breast cysts are fluid-filled sacs inside the breast. Breast cysts are usually noncancerous (benign). You may have one or...

Overview Vasculitis is inflammation of the blood vessels. The inflammation can cause the walls of the blood vessels to thicken,...

What is Meniere's disease? Meniere's disease is a disorder of the inner ear that can lead to vertigo and hearing...

Overview Infant jaundice is yellow discoloration of a newborn baby's skin and eyes. Infant jaundice occurs because the baby's blood...

Overview Progeria, also known as Hutchinson-Gilford syndrome, is an extremely rare, progressive genetic disorder that causes children to age rapidly,...

Exercised-induced asthma is a narrowing of the airways in the lungs triggered by strenuous exercise. Exercised-induced asthma causes shortness of...

Overview Ovarian hyperstimulation syndrome is an exaggerated response to excess hormones. This syndrome usually occurs in women taking injectable hormone...

Overview Autoimmune pancreatitis is a chronic inflammation that is caused by the body's immune system attacking the pancreas. Autoimmune pancreatitis...

What is asbestosis? Asbestosis is a chronic lung disease caused by inhaling asbestos fibers. Prolonged exposure to these fibers can...

Churg-Strauss syndrome is a disorder with the feature of blood vessel inflammation. This inflammation can restrict blood flow to organs...

Overview Small bowel prolapse, also called enterocele, occurs when the small intestine descends into the lower pelvic cavity and pushes...

Overview An inguinal hernia occurs when tissue, such as part of the intestine, protrudes through a weak spot in the...

Ataxia is a lack of voluntary coordination of muscle movements that can include gait abnormality, speech changes, and abnormalities in...

Toxic hepatitis is the inflammation of the liver caused by exposure to chemicals or drugs, or from drinking excessive amounts...

Overview Tendinitis is inflammation or irritation of a tendon — the thick fibrous cords that attach muscle to bone. The...

Peptic ulcers are sores that develop on the lining of the stomach. You can also get ulcers in part of...

A ventricular septal defect is an opening in the wall between the two lower chambers of the heart (the ventricles)....

Sickle cell anemia is one disease in a group of disorders known as sickle cell disease. Sickle cell anemia is...

Intestinal ischemia describes a variety of conditions that occur when blood flow to your intestines decreases due to a blocked...

Overview of Krabbe disease Krabbe disease is an inherited disorder that destroys the protective coating (myelin) of nerve cells in...

Overview Retinal diseases vary widely, but most of them cause visual symptoms. Retinal diseases can affect any part of your...