Learn about the causes of and treatments for acne.
Learn about isotretinoin, a prescription treatment for acne.
Learn about the symptoms, causes, treatment and prevention of acute bronchitis, a lung infection usually caused by a virus.
Learn how alcohol affects your health, and how to tell when alcohol abuse and dependence are problems for you.
Learn about alcohol withdrawal syndrome and what you can do to help manage it.
Learn about the symptoms, causes, diagnosis, treatment and prevention of allergies and allergic rhinitis (hay fever).
Learn whether allergy shots can help you deal with your allergies.
Alopecia areata is a disease of your immune system that causes unpredictable hair loss and emotional challenges.
Learn about the causes of and treatments for amblyopia.
Amenorrhea is the absence of menstruation or a monthly period. Learn about the various causes and treatments for primary and…
Learn about the causes and treatment of anaphylaxis, a severe, life-threatening allergic reaction.
Anemia is a common blood disorder that affects your red blood cells. Learn about the types, causes, treatments, and prevention…
Anger is a natural emotion for everyone, but it can be confusing for kids. Learn how to recognize, manage, and…
Learn about the symptoms, causes, diagnosis and treatment of arrhythmia, or irregular heartbeat.
Learn about the symptoms, causes and treatment of arrhythmogenic right ventricular dysplasia, a rare genetic heart defect.
Asperger’s syndrome is a developmental disorder on the autism spectrum that can be diagnosed in children as young as 18…
Learn about the causes, treatment and prevention of asthma symptoms (also called asthma attacks).
Living with asthma as a child can be difficult. Asthma attacks interfere with a child’s physical activity, sleep, and can…
Attention-Deficit Hyperactivity Disorder (ADHD) is a group of behaviors that causes problems with focus and self control. It affects children…
Learn about causes of and treatments for autism.
Visit our interactive symptom checker
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