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Diseases and Conditions

Find doctor-approved information about symptoms, causes, diagnosis, treatment and prevention of common diseases and conditions.

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  • man with allergies outside blowing his nose, allergic to trees in background

    Allergic Rhinitis (Allergies)

    Allergic rhinitis is the medical term for nasal allergies. These can seasonal or perennial and can be treated medications or…

  • woman putting drops in her eye

    Allergic Conjunctivitis

    Allergic conjunctivitis occurs when the clear, thin membrane that covers your eyeball becomes swollen and irritated. It can cause itching…

  • silhouette of a person drinking, sitting behind bottles of alcohol

    Alcohol Abuse

    Alcohol abuse is a pattern of drinking too much alcohol too often. This can harm your work, school, and…

  • AIDS

    AIDS (acquired immune deficiency syndrome) is a life-threatening condition caused by human immunodeficiency virus (HIV).

  • Bad student distracted listening to music sitting in a classroom

    Adult ADHD

    Attention-deficit hyperactivity disorder (ADHD) is a group of behaviors that makes it difficult to pay attention at school, work, or…

  • Man sitting on sofa, holding shoulder in pain

    Adhesive Capsulitis

    Adhesive capsulitis, or frozen shoulder, is the condition that occurs when inflammation in your shoulder eventually leads to difficulty moving…

  • Stethoscope resting on black chalkboard with the words Addison’s Disease

    Addison’s Disease

    Addison’s disease is a condition that affects your body’s adrenal glands. It interferes with your body’s ability to produce certain…

  • Acute Bronchitis

    Acute bronchitis is a contagious viral infection that causes inflammation of the bronchial tubes (the airways that carry air into…

  • Acne

    Acne is a common skin condition. It causes bumps on the skin known as pimples to appear on the face…

  • ACL Injury

    An ACL injury is the overstretching or tearing of the anterior cruciate ligament in your knee. It is a common…

  • Abusive Head Trauma

    Abusive head trauma (shaken baby syndrome) is a form of child abuse that can be deadly or leave a baby…

  • A woman talking to her doctor

    Abnormal Uterine Bleeding

    Abnormal uterine bleeding is any heavy or unusual bleeding from the uterus. In most women, abnormal uterine bleeding is caused…

  • Illustration of a human body with close-ups of a normal aorta and one with an abdominal aortic aneurysm

    Abdominal Aortic Aneurysm (AAA)

    Sometimes an area of a blood vessel wall will get weak. It can start to swell like a balloon and…

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