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Sarcoidosis
Sarcoidosis is a disease in which immune cells form small lumps, called granulomas, in your organs, often in the…
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Scarlet Fever
Scarlet fever is a bacterial infection that usually effects children between the ages of 5 and 15. It can be…
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Schizophrenia
Schizophrenia is a mental illness that interferes with the way you think, feel, and behave.
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Scleroderma
Scleroderma is a rare autoimmune disorder. There are 2 types of scleroderma. One type affects the skin. The other type…
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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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Seasonal Affective Disorder
Seasonal affective disorder (SAD) is a type of depression that is triggered by the seasons of the year. Symptoms usually…
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Seborrheic Dermatitis
Learn about the causes of and treatment options for seborrheic dermatitis.
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Sensory Processing Disorder (SPD)
Sensory processing disorder (SPD) is a condition that affects how your brain processes sensory information (stimuli).
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Sever's Disease
Sever’s disease is a common heel injury that occurs in children. It is painful and caused by swelling of the…
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Sexual Dysfunction in Men and Women
Learn about the symptoms, causes and treatment of sexual dysfunction disorders.
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Sexually Transmitted Infections (STIs)
Learn about sexually transmitted infections and how you can prevent them.
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Shaken Baby Syndrome (Abusive Head Trauma)
Abusive head trauma (shaken baby syndrome) is a form of child abuse that can be deadly or leave a baby…
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Shin Splints
Shin splints describe a type of pain in your shinbone (tibia). They are often caused by overuse and heal within…
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Shingles
Shingles is a painful skin rash. It is also called zoster or herpes zoster. It is caused by the same…
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Shortness of Breath
Shortness of breath happens when you cannot get enough air into your lungs. It can be caused by asthma, lung…
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Shoulder Instability
Shoulder instability is the term doctors use when your shoulder is slightly out of place or feels like it…
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Sick Sinus Syndrome
Sick sinus syndrome is the name for several conditions in which your heart doesn’t work the correct way. Your heart…
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Sickle Cell Disease
Sickle cell disease (SCD) is a genetic red blood cell disorder.
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Silent Heart Attacks
A silent heart attack is a heart attack without traditional symptoms. Nearly half of all heart attacks are silent heart…
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Sinus Infection (Sinusitis)
A sinus infection is a condition where the lining of your sinuses becomes inflamed. It can be caused by bacteria…