Learn more about the causes, symptoms, treatment and prevention of this common lip sore caused by the herpes simplex virus type 1 (HSV-1).
Disease
Melanoma
Learn about the symptoms, diagnosis and treatments for the most serious form of skin cancer.
Disease
Mitral valve regurgitation
Learn more about the symptoms and treatment of this most common heart valve condition, which causes blood to leak backward in the heart.
Disease
Mitral valve prolapse
This heart condition, also called Barlow syndrome, affects the valve separating the left heart chambers. Know the symptoms and when it’s treated.
Disease
Infant reflux
Learn more about this condition in which a baby spits up food or liquid. Most babies outgrow this common condition by the age of 18 months.
Disease
Common cold in babies
This viral infection causes a runny and stuffy nose. Find out how to ease symptoms and when to see a healthcare professional.
Disease
Lazy eye (amblyopia)
Abnormal visual development early in life can cause reduced vision in one eye, which often wanders inward or outward.
Disease
Alpha-1-antitrypsin deficiency
Learn about the symptoms and risk factors of alpha-1-antitrypsin deficiency, a condition passed down in families, that can affect the lungs, liver or both.
Disease
Frontal lobe seizures
In this common form of epilepsy, the seizures stem from the front of the brain. They can produce symptoms that appear to be from a mental illness.
Disease
Tapeworm infection
Tapeworms in the intestines usually cause mild disease. Immature tapeworms, called larval cysts, can cause serious disease in other parts of the body.
Disease
Nephrotic syndrome
Swelling around your feet and ankles is a common sign of this condition that occurs when your kidneys pass too much protein in your urine.
Disease
Angina
Learn about a type of chest pain caused by reduced blood flow to the heart. This chest pain is a symptom of heart disease.