Diseases and Conditions

All conditions
  • Abdominal Aortic Aneurysm (AAA)

    Learn about the risks, symptoms and treatment of abdominal aortic aneurysm… What is an abdominal aortic aneurysm (AAA)? The main blood vessel in your body is the aorta (say: a-or-ta). It is a long blood vessel that reaches from your chest into your abdomen…

  • 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…

  • Abusive Head Trauma

    Abusive head trauma (shaken baby syndrome) is a form of child abuse that can be deadly or leave a baby… What is abusive head trauma? Abusive head trauma is also called shaken baby syndrome. It’s a form of child abuse that can be deadly…

  • ACL Injuries

    ACL injuries have become more common among athletes, women, and children. PEP training programs can help with prevention… What is an ACL injury? ACL refers to the anterior cruciate ligament. It is 1 of 4 ligaments in your knee. The other knee ligaments are…

  • 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…

  • 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…

  • Addison’s Disease

    Learn about the symptoms, causes, diagnosis and treatment of Addison’s disease, a disease that affects your body’s adrenal glands… Overview What is Addison's disease? Addison's disease affects your body's adrenal glands. The adrenal glands are part of the endocrine system. The endocrine system is…

  • Adhesive Capsulitis

    Learn about the symptoms, causes, diagnosis and treatment of adhesive capsulitis, a condition in which you lose the ability to… Overview What is adhesive capsulitis? Adhesive capsulitis (say: "add-he-sive cap-sool-eye-tis") is when you lose the ability to move your shoulder around in all directions…

  • 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…

  • 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…

  • 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…

  • Alzheimer's Disease

    Learn about the symptoms, causes, diagnosis, treatment and complications of Alzheimer’s disease, a type of dementia.Alzheimer's Foundation of America Caregiver… Overview What is Alzheimer's disease? Alzheimer's disease is a type of dementia. Dementia is a word that doctors use to describe a wide range…

  • 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…

  • Anal Fissures

    Anal fissures are small tears in the lining of the lower rectum. They are usually caused by straining during a… What are anal fissures? An anal fissure is a small crack or tear in the thin, moist lining of the lower rectum. Symptoms of anal…

  • Anal Fistulas

    An anal fistula is an abnormal connection that forms between the anus and the skin outside of it. It usually… Overview An anal fistula is an abnormal tube-like connection, which forms between the inside of the anus (anal gland) and the skin right outside…

  • 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…

  • Angina

    Learn about the symptoms, causes, diagnosis, treatment and prevention of angina (chest pain).American Heart Heart, Lung, and Blood Institutehttp://www.nhlbi.nih.gov… Overview What is angina? Angina (say: "ann-jie-na") is a squeezing pain or a pressing feeling in the chest. It is most often caused by blockages…