Kids and Teens

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  • Abnormal Uterine Bleeding

    Learn about the causes, diagnosis and treatment of abnormal uterine bleeding… Overview What is abnormal uterine bleeding? Abnormal uterine bleeding is any bleeding from the uterus (through your vagina) other than your normal monthly period. Having extremely heavy bleeding during your period can also…

  • Acne

    Learn about the causes of and treatments for acne… Overview What is acne? Acne is a skin problem that occurs when the hair follicles of your skin are blocked by a mix of dead skin cells and sebum (oil). When this happens, bacteria can…

  • Acne | Isotretinoin

    Learn about isotretinoin, a prescription treatment for acne… What is isotretinoin? Isotretinoin is a medicine used to treat very bad acne. It is usually used for cystic acne that did not get better after treatment with other medicines. It is important for you to take…

  • Acute Bronchitis

    Learn about the symptoms, causes, treatment and prevention of acute bronchitis, a lung infection usually caused by a virus… Overview What is acute bronchitis? Acute bronchitis is an infection of the bronchial (say: "brawn-kee-ull") tree. The bronchial tree is made up of the tubes…

  • Alcohol Abuse

    Learn how alcohol affects your health, and how to tell when alcohol abuse and dependence are problems for you… Overview How can I tell if alcohol is a problem for me? Alcohol is a problem if it affects any part of your life, including…

  • Alcohol Withdrawal Syndrome

    Learn about alcohol withdrawal syndrome and what you can do to help manage it… Alcohol Withdrawal Syndrome What is alcohol withdrawal syndrome? Alcohol withdrawal syndrome is a set of symptoms that people who have had an alcohol abuse problem for weeks, months or years may…

  • Allergic Conjunctivitis

    Learn about the causes of conjunctivitis, and the prevention and treatment of allergic conjunctivitis… Overview What is conjunctivitis? A clear, thinmembrane called the conjunctiva covers your eyeball and the inside of your eyelids. If something irritates this covering, your eyes may become red and…

  • Allergic Rhinitis

    Learn about the symptoms, causes, diagnosis, treatment and prevention of allergies and allergic rhinitis (hay fever)… Overview What is an allergy? You have an allergy when your body overreacts to things that don't cause problems for most people. These things are called allergens. Your…

  • Allergy Shots: Could They Help Your Allergies?

    Learn whether allergy shots can help you deal with your allergies… Allergy Shots: Could They Help Your Allergies? How do allergy shots work? An allergy shot contains a very small amount of the substance that you are allergic to (called the allergen). Common allergens include…

  • Alopecia Areata (AA)

    Alopecia areata is a disease of your immune system that causes unpredictable hair loss and emotional challenges… What is alopecia areata? Alopecia areata is a form of alopecia (hair loss). It’s a non life-threatening disease of your immune system affecting the hair on your…

  • Amblyopia

    Learn about the causes of and treatments for amblyopia… Overview What is amblyopia? Amblyopia (say this: "am-blee-oh-pee-ah") is an eye problem that causes loss of or poor vision in one or both of a child's eyes. Amblyopia usually affects only one of the eyes,…

  • Amenorrhea

    Learn about the causes and treatment of amenorrhea, or when you don’t have menstrual periods or your menstrual periods have… Overview What is amenorrhea? Amenorrhea (say: "ay-men-or-ee-uh") is when you don't have menstrual periods. There are two types of amenorrhea. Primary amenorrhea is when…

  • Anaphylaxis

    Learn about the causes and treatment of anaphylaxis, a severe, life-threatening allergic reaction… Overview What is anaphylaxis? Anaphylaxis (say: "anna-full-ax-iss") is a life-threatening allergic reaction. It starts soon after you are exposed to something you are severely allergic to. You may have swelling, itching…

  • Anemia

    Learn about the causes, symptoms, diagnosis and treatment of iron-deficiency anemia… Overview What is anemia? Anemia is a condition that affects your red blood cells. Your red blood cells carry oxygen from your lungs to the rest of your body. Hemoglobin is the protein…

  • Arrhythmia

    Learn about the symptoms, causes, diagnosis and treatment of arrhythmia, or irregular heartbeat… Overview What is an arrhythmia? An arrhythmia is a change in the rhythm of your heartbeat. When the heart beats too fast, it's called tachycardia. When it beats too slow, it's…

  • Arrhythmogenic Right Ventricular Dysplasia (ARVD)

    Learn about the symptoms, causes and treatment of arrhythmogenic right ventricular dysplasia, a rare genetic heart defect… Overview What is arrhythmogenic right ventricular dysplasia? Arrhythmogenic right ventricular dysplasia (say: "uh-rith-mo-jen-ic right ven-trick-yoo-lar dis-play-shuh"), also called ARVD, is a rare heart problem. The heart has…

  • Asperger's Syndrome

    Asperger’s syndrome is a developmental disorder on the autism spectrum that can be diagnosed in children as young as 18… What is Asperger's syndrome? Asperger’s syndrome is part of the overall autism spectrum disorder (ASD) diagnosis. It is a developmental disorder that is considered…

  • Asthma

    Learn about the causes, treatment and prevention of asthma symptoms (also called asthma attacks)… Overview What is asthma? Asthma is a disease of the lungs. The airways of people who have asthma are extra sensitive to the things they're allergic to (called allergens) and…

  • Asthma in Kids

    Living with asthma as a child can be difficult. Asthma attacks interfere with a child’s physical activity, sleep, and can… What is asthma? Asthma is a disease that often starts in childhood. Asthma makes it difficult for your child’s lungs to get air. That…

  • Attention-Deficit Hyperactivity Disorder (ADHD)

    Learn about the symptoms and causes of ADHD, and how it is treated… Overview What is ADHD? Attention-deficit hyperactivity disorder (ADHD) is the name of a group of behaviors found in many children and adults. People who have ADHD have trouble paying attention in…