Diseases and Conditions

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

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All conditions that start with the letter S
  • 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 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

    Learn about the symptoms, causes, diagnosis and treatment of shoulder instability, or when your shoulder feels like it might go…

  • Sick Sinus Syndrome

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

  • Sickle Cell Disease

    Sickle cell disease (SCD) is a genetic condition that refers to a group of red blood cell disorders. The most…

  • Silent Heart Attacks

    Silent heart attacks are heart attacks that are experienced with few, if any, symptoms. They are often mistaken for other…

  • Sinusitis

    Sinusitis is a condition in which the lining of your sinuses becomes inflamed. Learn about the symptoms, causes, and…

  • Sjögren’s Syndrome

    Sjögren’s Syndrome is an autoimmune disease that causes dry mouth and dry eyes. It can also affect other parts of…

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