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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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  • Woman performing breast exam

    Benign Breast Conditions

    A breast cyst is a fluid-filled sac inside the breast. Breast cysts are common in women. They might cause a…

  • blurred, spinning picture of a person’s feet as they walk through fall leaves

    Benign Paroxysmal Positional Vertigo (BPPV)

    Benign paroxysmal positional vertigo can be caused by problems with the inner ear related to ear infections, family history, or…

  • Benign Prostatic Hyperplasia (BPH)

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

  • Two-faced woman, one happy and one sad, holding neutral mask in between

    Bipolar Disorder

    Bipolar disorder is a mental illness that causes extreme mood swings between happy and sad. People of all ages and…

  • X-ray of woman’s pelvis, showing bladder stones

    Bladder Stones

    Bladder stones are small crystals that form in your urine. They are hard and become trapped in your bladder. They…

  • Woman holding eye in pain

    Blepharospasm

    Blepharospasm is a rare condition that causes your eyelid to blink or twitch. You can’t control it. It’s caused by…

  • Hands grabbing a bloated stomach

    Bloating

    Bloating is when your stomach is filled with air or gas from what you eat, your lifestyle, or for medical…

  • Blood Clots

    Blood clots are clumps of blood that form inside your body and can be harmful or even deadly if they…

  • red and white blood cells traveling through a vein in the human body

    Blood Poisoning

    Blood poisoning happens when an infection enters your bloodstream and your body reacts to the infection.

  • X-ray of image with red highlighting area of cancer

    Bone Cancer

    Bone cancer is cancer that in most cases spreads to the bones from another part of the body. There are…

  • A woman dressed in pink wears a pink ribbon on her chest to promote breast cancer awareness. Breast cancer is the second most common cancer among women, but its death rate has declined over the last few years thanks to early detection.

    Breast Cancer

    Breast cancer is the second most common cancer among women, but its death rate has declined over the last few…

  • Close-up cropped portrait of young woman with breast pain touching chest

    Breast Pain in Women

    Breast pain in women can be caused by many factors, most of which are not serious health threats.

  • A mother holds baby being checked for bronchiolitis by a doctor with a stethoscope.

    Bronchiolitis

    Bronchiolitis is a common lung infection in infants and young children. It is usually caused by a virus. RSV is…

  • a young athletic woman grips her neck and shoulder and grimaces in pain

    Burners

    Burners are minor nerve injuries that occur between your neck and are common in people who play contact sports.

  • A man holds his mouth in pain. Burning mouth syndrome (BMS) is marked by pain and discomfort in the mouth, lips, and/or tongue.

    Burning Mouth Syndrome

    Burning mouth syndrome (BMS) is marked by pain and discomfort in the mouth, lips, and/or tongue. Find treatment and tips…

  • A businessman holds his hands on his aching hips. Bursitis of the hip is the swelling of the bursae, fluid-filled sacs that cushion tendons, ligaments, and muscles. It can cause pain and tenderness.

    Bursitis of the Hip

    Bursitis of the hip is the swelling of the bursae, fluid-filled sacs that cushion tendons, ligaments, and muscles. It can…

  • C. diff., or clostridium difficile, bacterium isolated on black background. A clostridium difficile (C. diff.) infection is a bacterial infection in your intestines. C. diff. infections can range from mild to severe.

    C. diff (Clostridium difficile) Infection

    A clostridium difficile (C. diff.) infection is a bacterial infection in your intestines.

  • A doctor holds a cancer patient’s hand. Cancer is a collection of many diseases that all involve the growth of abnormal cells. Some common forms are skin, breast and prostate cancer.

    Cancer

    Cancer is a collection of many diseases that all involve the growth of abnormal cells. Some common forms are skin…

  • Close-up of child with canker sore on inside of lip

    Canker Sores

    Canker sores are small, thin sores in your mouth. You might get them on the inside of your lips or…

  • A woman having chest pains places her hands over her heart. Cardiomyopathy is a disease that causes your heart muscles to become enlarged, which can weaken your heart over time.

    Cardiomyopathy

    Cardiomyopathy is a disease of the muscles in the heart. It causes your heart muscles to become enlarged.

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