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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 massaging fingers and hand to increase blood flow

    Raynaud's Disease

    Raynaud’s disease is a rare condition that narrows your blood vessels. It causes your fingers or toes to turn color…

  • Reactive Arthritis

    Reactive arthritis occurs when your immune system reacts to an infection somewhere else in your body. It can affect your…

  • teddy bear sitting in an empty nursery

    Recurrent Pregnancy Loss

    Only 1% of women experience multiple miscarriages. They can be caused by health conditions including chromosome defects and uterus…

  • A senior man experiences bloating and reflux from indigestion.

    Reflux/Acid Reflux (GERD)

    Acid reflux occurs when acid from your stomach backs up into your throat. It can be caused by many factors…

  • A doctor using a otoscope to look inside a young girls ear canal

    Repeated Infections in Children

    Learn why your child may get several infections while he or she is still young.

  • 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…

  • Reye’s Syndrome

    Reye’s syndrome is a rare but serious illness common in children recovering from a virus and taking aspirin. It can…

  • 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 rheumatism / arthritis medical examination

    Rheumatoid Arthritis

    Rheumatoid arthritis (RA) is a chronic (lasting) inflammatory disorder. It causes swelling and pain in the lining of your…

  • A baby lays on a blue blanket with his legs and feet visible. Rickets is a rare disorder that affects the bones, causing them to soften and break easily. It is most common in children.

    Rickets

    Rickets is a rare disorder that affects children’s bones, causing them to soften and break easily.

  • Ringworm on a man’s wrist

    Ringworm - Symptoms and Treatment

    Ringworm is a skin infection that makes a rash shaped like a ring. The rash can occur different places on…

  • Young Woman with Perfect Skin and Skin Problem. Unhealthy and Healthy Skin After Treatment.

    Rosacea

    Rosacea is a common skin condition that occurs on the face. It causes redness and small bumps that are similar…

  • Stethoscope wth rotavirus sign

    Rotavirus

    Rotavirus is a highly contagious infection commonly affecting babies and young children. A rotavirus vaccine offers some, but not full,…

  • A toddler wears an oxygen mask. RSV (respiratory syncytial virus) is a common virus that makes it hard to breathe. RSV is common in children under 2, but anyone can get it.

    RSV (Respiratory Syncytial Virus)

    Respiratory syncytial virus (RSV) is a common virus. It affects your lungs, making it difficult to breathe. The virus is…

  • A doctor wearing a white coat sits with a patient in his office to go over the benefits of the RSV vaccine.

    RSV in Adults Over 60

    Older adults (above the age of 60) are at higher risk for severe RSV infection. This is especially true if…

  • Lung Illustration

    Sarcoidosis

    Sarcoidosis is a disease in which immune cells form small lumps, called granulomas, in your organs, often in the…

  • A young boy shows a skin rash covering his chest and arms. Scarlet fever is a bacterial infection that usually affects children between the ages of 5 and 15. It can be treated with antibiotics.

    Scarlet Fever

    Scarlet fever is a bacterial infection that usually effects children between the ages of 5 and 15. It can be…

  • A young women crouches in the corner and holds her head.

    Schizophrenia

    Schizophrenia is a mental illness that interferes with the way you think, feel, and behave.

  • Hand Massage to help pain in the finger joints.

    Scleroderma

    Scleroderma is a rare autoimmune disorder. There are 2 types of scleroderma. One type affects the skin. The other type…

  • Pediatrician examining little girl with back problems.

    Scoliosis

    Scoliosis is an abnormal curve of the spine (backbone). Normally, the spine is straight. With scoliosis, the spine is crooked…

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