Diseases and Conditions

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

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  • sad-looking woman in a coat and scarf stands under an umbrella in the rain

    Seasonal Affective Disorder

    Seasonal affective disorder (SAD) is a type of depression that is triggered by the seasons of the year. Symptoms usually…

  • Seborrheic Dermatitis

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

  • Preschool boy plays on a tire swing, leaning back as far as he can. Sensory processing disorder (SPD) is a condition that affects how your brain processes sensory information (stimuli).

    Sensory Processing Disorder (SPD)

    Sensory processing disorder (SPD) is a condition that affects how your brain processes sensory information (stimuli).

  • Sever's Disease

    Sever’s disease is a common heel injury that occurs in children. It is painful and caused by swelling of the…

  • 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.

  • 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…

  • Woman runner holding shin in pain

    Shin Splints

    Shin splints describe a type of pain in your shinbone (tibia). They are often caused by overuse and heal within…

  • A shingles rash on a man’s back

    Shingles

    Shingles is a painful skin rash. It is also called zoster or herpes zoster. It is caused by the same…

  • An illustration of lung shapes drawn in different colors. Shortness of breath happens when you cannot get enough air into your lungs. Causes include asthma, lung diseases, panic attacks, or allergies.

    Shortness of Breath

    Shortness of breath happens when you cannot get enough air into your lungs. It can be caused by asthma, lung…

  • Shoulder Instability

    Shoulder instability is the term doctors use when your shoulder is slightly out of place or feels like it…

  • Sick Sinus Syndrome

    Sick sinus syndrome is the name for several conditions in which your heart doesn’t work the correct way. Your heart…

  • Sickle Cell Disease

    Sickle cell disease (SCD) is a genetic red blood cell disorder.

  • doctor performs an echocardiogram to check the heart

    Silent Heart Attacks

    A silent heart attack is a heart attack without traditional symptoms. Nearly half of all heart attacks are silent heart…

  • Woman in business clothes holding sinuses in pain

    Sinus Infection (Sinusitis)

    A sinus infection is a condition where the lining of your sinuses becomes inflamed. It can be caused by bacteria…

  • 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 doctor uses a lighted instrument to closely examine moles on a female patient’s neck

    Skin Cancer

    Skin cancer is the most common form of cancer and highly preventable with regular screening.

  • Close-up of doctors hands checking man’s skin. Skin tags are non-cancerous skin growths that feel like a hanging mole. Anyone can get them, and they are more common with age.

    Skin tags

    Skin tags are non-cancerous skin growths that feel like a hanging mole. They are more common with age.

  • diagram showing interrupted airflow during sleep

    Sleep Apnea

    Sleep apnea is a serious sleep disorder that can cause you to stop breathing multiple times while you sleep.

  • Sleepwalking

    Learn about the causes of and ways to deal with sleepwalking.

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