Diseases and Conditions

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

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All conditions that start with the letter B
  • Babesiosis

    Babesiosis is an infection of the red blood cells. It’s caused by a parasite carried by deer ticks. It can…

  • Bacterial Endocarditis

    Bacterial, or infective, endocarditis (BE) is a type of infection. It occurs in the valves and inner lining of your…

  • Bacterial Vaginosis (BV)

    Bacterial vaginosis is a mild infection in the vagina caused by an overgrowth of bacteria. Researchers do not completely understand…

  • Barrett’s Esophagus

    Barrett’s esophagus is a condition often caused by GERD (gastroesophageal reflux disease). Learn how to help prevent and treat…

  • Bartholin's Gland Cyst

    Bartholin gland cysts are swollen vaginal glands near the opening of the vagina. Learn about causes and how to treat…

  • Bedbugs

    Bedbugs are parasites that can hide in mattresses and feed at night. Learn how to identify, treat, and prevent…

  • Bell’s Palsy

    Bell’s palsy is a condition that temporarily paralyzes the side of your face. Learn about the symptoms, causes, and…

  • Benign Breast Conditions

    A benign breast condition is a lump, cyst, or nipple discharge that is not cancerous. It can affect men and…

  • Benign Paroxysmal Positional Vertigo (BPPV)

    Benign paroxysmal positional vertigo (BPPV) is an inner ear problem that causes dizziness.

  • Benign Prostatic Hyperplasia (BPH)

    Benign prostatic hyperplasia (BPH) is the medical term for an enlarged prostate. This condition is associated with aging and mimics…

  • Bipolar Disorder

    Bipolar disorder is a mental illness that causes extreme mood swings between mania and depression. Learn about symptoms and…

  • Bladder Stones

    Bladder stones are hard masses found in your bladder. Symptoms are similar to those of kidney stones and urinary tract…

  • Blepharospasm

    Blepharospasm is involuntary blinking or twitching of your eyelid. It could be caused by stress or something more serious, such…

  • Bloating

    Bloating is pain, discomfort, and fullness that occurs in your abdomen (stomach). Bloating can be temporary or severe, depending on…

  • Blood Clots

    Blood clots are differently sized clumps of blood that can form inside your body. Most are harmless, unless the clot…

  • Blood Poisoning

    What is blood poisoning? Blood poisoning has nothing to do with poison. It is an early stage of sepsis. Sepsis is a life-threatening infection in your bloodstream. Untreated blood poisoning can cause sepsis. Sepsis can cause organ failure and death. Sepsis is unpredictable

  • Bone Cancer

    Bone cancer often is caused by the spreading of cancer from another part of the body. Learn about the types…

  • Breast Cancer

    Breast cancer is a cancer that begins in breast tissue. It usually shows up as one of three types of…

  • Breast Pain in Women

    Breast pain is more common in younger women. It is not usually a sign of breast cancer.

  • Bronchiolitis

    Bronchiolitis is a common lung infection in infants and young children. It is often caused by a virus. Symptoms can…