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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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  • 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

    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…

  • Nonalcoholic Fatty Liver Disease

    Nonalcoholic fatty liver disease (NAFLD) is a buildup of fat in the liver. This common condition can be harmless but…

  • Nasopharyngeal Cancer

    Nasopharyngeal cancer is a malignant tumor that develops in the nasopharynx, the area where the back part of your nose…

  • Head Lice

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

  • A man looking in the mirror at his receding hairline

    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,…

  • An illustration of a healthy kidney and a kidney with cysts

    Polycystic Kidney Disease

    Polycystic kidney disease (PKD) is an inherited disease that affects the kidneys. It causes abnormal sacs of fluid (called cysts)…

  • A doctor listens to a patient’s lungs with a stethoscope. Pneumonia is an infection of the lungs usually caused by bacteria or a virus. Walking pneumonia is a mild case of pneumonia.

    Pneumonia and Walking Pneumonia

    Pneumonia is an infection of the lungs. How serious it is depends on what caused the pneumonia, your age, and…

  • A photo of a troubled teen meeting with his psychologist

    Oppositional Defiant Disorder

    Oppositional defiant disorder is a behavior condition that affects children and teens. It causes a negative effect on the child’s…

  • a woman with keratosis pilaris scratches the back of her arm

    Keratosis Pilaris

    Keratosis pilaris is a harmless skin condition that causes small bumps to appear on the skin. They can appear anywhere…

  • woman with a keloid or raised scar on her shoulder

    Keloids (Raised Scars)

    Keloids are a type of raised scar. They occur where the skin has healed after an injury and can grow…

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