Learn how an imbalance of the hormones estrogen and testosterone can cause breast tissue swelling in boys or men.
Disease
Epidermolysis bullosa
Learn about a rare inherited disease that often shows up in infancy and causes fragile, blistering skin on the palms and feet. Severe disease may be fatal.
Disease
Fibrocystic breasts
Learn about this condition that's common in women, including symptoms, possible causes and testing to determine when breast cysts might need treatment.
Disease
Gastrointestinal bleeding
Bleeding from anywhere in your digestive tract is a symptom of a disorder. Bleeding can be hidden or obvious, slight or severe.
Disease
Group B strep disease
This common type of bacteria is often harmless in healthy adults. But it can cause serious illness in newborns and adults with certain long-term conditions, such as diabetes.
Disease
Guillain-Barre syndrome
This rare autoimmune condition affects the nerves, causing weakness and tingling in the arms and legs that quickly spreads throughout the body.
Disease
Heavy menstrual bleeding
Learn about the causes and treatment of heavy menstrual periods.
Disease
Hepatitis B
This serious liver infection is caused by a virus that spreads easily. Learn about the symptoms, treatment and how to prevent it.
Disease
High blood pressure (hypertension)
Learn the symptoms and treatment of this condition — which raises the risk of heart attack and stroke — and the lifestyle changes that can lower the risk.
Disease
High blood pressure in children
Children can develop high blood pressure for the same reasons adults do — excess weight, poor nutrition and lack of exercise.
Disease
IgA nephropathy (Berger disease)
This disease causes kidney inflammation that, over time, can interfere with the kidneys' ability to filter waste from the blood.
Disease
Inflammatory bowel disease (IBD)
Long-lasting diarrhea and belly pain could be caused by inflammatory bowel disease, also called IBD. Learn about IBD causes, diagnosis and treatment.