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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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  • Female doctor wrapping the head of a young man with gauze

    Traumatic Brain Injury

    A traumatic brain injury is any sudden injury to your brain. It could be from a bump, blow, or jolt…

  • Pressure Sores

    Pressure sores are sores on your skin. They’re usually caused by being in a bed or wheelchair nearly all the…

  • Nosebleeds

    A nosebleed is blood loss from the tissue that lines your nose. It most often occurs in only one nostril,…

  • Hereditary Hemochromatosis

    Hereditary hemochromatosis is a disease in which your body has too much iron. This extra iron can damage your tissues…

  • A young boy has his throat swabbed by a doctor. Rheumatic fever is a rare inflammatory disease. It’s tied to the bacteria that causes strep throat and scarlet fever.

    Rheumatic Fever

    Rheumatic fever is a rare disease. It usually doesn’t happen in the United States. It’s tied to the bacteria that…

  • close up of a woman holding her abdomen in discomfort

    Pelvic Inflammatory Disease

    Pelvic inflammatory disease is an infection of female reproductive organs. It can make it hard to get pregnant and cause…

  • Mountain climber using mini portable oxygen cylinder to avoid and treat high-altitude illness

    High-Altitude Illness

    High-altitude illness can occur when you travel to altitudes higher than 8,000 feet. It happens when your body doesn’t get…

  • Infant Jaundice

    Infant jaundice is common. It can make your baby’s skin, eyes, and mouth turn yellow. While it may look odd,…

  • 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…

  • fluffy domestic cat stretches its paw and claws in the air

    Cat-Scratch Disease (Cat-Scratch Fever)

    Cat-scratch disease is an infection you can get after a cat scratches, bites, or licks you. It is caused by…

  • Barrett’s esophagus is a condition that affects your esophagus. It happens when acid from your stomach goes back up into your esophagus.

    Barrett’s Esophagus

    Barrett’s esophagus is a condition that affects your esophagus. It happens when acid from your stomach goes back up into…

  • young boy using spacer and mask with asthma inhaler

    Asthma

    Asthma is a chronic (long-term) disease of the lungs. It inflames and narrows the airways, making it harder to…

  • A woman puts drops in her eyes. Sjögren’s syndrome is an autoimmune disease that causes dry mouth and dry eyes. It can also cause dryness in other places.

    Sjögren’s Syndrome

    Sjögren’s syndrome is an autoimmune disease that causes dry mouth and dry eyes. It can also cause dryness in other…

  • A photo of female legs isolated on a white background

    Restless Leg Syndrome

    Restless legs syndrome is a condition in which your legs feel very uncomfortable when you’re sitting or lying down. It…

  • Acne is a common skin condition. It causes pimples to appear on the face and/or on the back, chest, arms, and neck.

    Acne

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

  • Flatulence/Gas

    Flatulence is another name for gas. It happens when air stays in your abdomen after you eat. It can be…

  • A child scratches her head with a look of discomfort on her face. Head lice are small wingless insects that can get on your hair and scalp. Lice bites may cause scratching, skin irritation or infection.

    Head Lice

    Head lice are small wingless insects that can get on your hair and scalp. Lice bites may cause constant scratching,…

  • A man looks in the mirror at his receding hairline. It is normal to shed some hair each day. However, some people may experience excessive (more than normal) hair loss for various reasons.

    Hair Loss

    It is normal to shed some hair each day as part of this cycle. However, some people may experience excessive…

  • Close up of a child's cleft lip

    Cleft Lip and Cleft Palate

    Cleft lip and cleft palate are birth defects that happen when a baby’s lip or mouth don’t form correctly early…

  • an infant lies on her back without a diaper

    Diaper Rash

    Diaper rash is redness and rash on a baby’s bottom or genital area. It is a very common rash. Normally,…

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