Diseases and Conditions

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

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  • Rickets

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

  • Ringworm

    Ringworm (tinea) is a common skin infection. The rash is ring-shaped and can occur on different parts of your body…

  • Rosacea

    Rosacea is a common skin condition that occurs on the face. It is marked by redness, which can be relieved…

  • Rotavirus

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

  • Sarcoidosis

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

  • Scarlet Fever

    Scarlet fever is an infection caused by the same bacteria as strep throat. Learn about the symptoms and contact your…

  • Schizophrenia

    Schizophrenia is a serious mental illness that distorts your perception of reality and interferes with the way you think, feel,…

  • Scleroderma

    Scleroderma, a rare autoimmune disorder, can be localized or systemic, and can affect the skin and/or internal organs.

  • Scoliosis

    Scoliosis is an abnormal curve of the spine (backbone) that can cause you to lean to one side, have uneven…

  • Seasonal Affective Disorder

    Seasonal affective disorder (SAD) is a type of depression triggered by the seasons. It is likely related to the loss…

  • Seborrheic Dermatitis

    Learn about the causes of and treatment options for seborrheic dermatitis.

  • Sensory Processing Disorder (SPD)

    Sensory processing disorder is a condition that affects how your brain processes sensory information: things you see, hear, smell, taste,…

  • Sever's Disease

    Sever's disease is a common heel injury that occurs in kids. Learn more about the causes, diagnosis, treatment and prevention…

  • Sexual Dysfunction in Men and Women

    Learn about the symptoms, causes and treatment of sexual dysfunction disorders.

  • Sexually Transmitted Infections (STIs)

    Learn about sexually transmitted infections and how you can prevent them.

  • Shin Splints

    Shin splints are a type of pain you get in your shinbone (tibia) and connected muscles and tendons. Overuse is…

  • Shingles

    Shingles is a painful skin rash caused by the virus that causes chickenpox. Nearly one-third of people in the United…

  • Shortness of Breath

    Shortness of breath is the feeling that you cannot get enough air into your lungs. It can be a symptom…

  • Shoulder Instability

    Shoulder instability is a condition when your shoulder is slightly out of place, but not completely out of the…

  • Sick Sinus Syndrome

    Learn about the symptoms, diagnosis and treatment of sick sinus syndrome, the name for several conditions in which the heart’s…