Diseases and Conditions

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

Filter By Alphabet
All conditions
  • Strep Throat

    Strep throat is an infection caused by bacteria. It is called “strep” because the bacteria that causes the infection is…

  • Stroke

    Stroke is a medical condition that occurs when the blood flow to your brain stops. It can lead to serious…

  • Stuttering

    Stuttering is a problem commonly associated with childhood, but, for some people, it can last a lifetime.

  • Sty

    A sty is a painful, red bump that forms on the edge of your eyelid. It’s usually not serious and…

  • Substance Abuse

    Learn about how to tell whether you have an addiction to alcohol or other drugs, and how you can stop…

  • Sudden Infant Death Syndrome (SIDS)

    Sudden infant death syndrome (SIDS) is the somewhat unexplained reason a baby under the age of 1 dies in its…

  • Syphilis

    Syphilis is a serious infection passed from one person to another through sexual contact.

  • Teeth Grinding (Bruxism)

    Teeth grinding, also called bruxism, is the conscious or unconscious grinding of teeth that happens most often in children.

  • Tennis Elbow

    Tennis elbow (lateral epicondylitis) is a common condition that occurs when the outer tendons of the elbow swell or…

  • Testicular Cancer

    Testicular cancer can occur in one or both of a man’s testicles. Learn about the symptoms and how to detect…

  • Testicular Torsion

    Testicular torsion is when a testicle becomes twisted, restricting its blood supply. If not treated quickly, the testicle can become…

  • Thalassemia

    Learn about the causes, symptoms, diagnosis, treatment and complications of thalassemia.

  • Thrush

    Thrush is a yeast infection that occurs on the tongue and mouth. It is caused by a fungus. Newborns, children,…

  • Thyroid Nodules

    Learn about the symptoms of, tests for and treatments of thyroid nodules.

  • Thyroiditis

    Learn about the types, symptoms, causes, diagnosis and treatment of thyroiditis, a name for several disorders that cause inflammation of…

  • Tick-Borne Relapsing Fever

    Learn about tick-borne relapsing fever and how it is treated.

  • Tics and Tourette Syndrome

    Tourette syndrome is a movement disorder that starts in childhood. It makes a person repeatedly twitch, move, or make…

  • Tinnitus

    Tinnitus is when you hear noise in your ears. The noise is often described as ringing, but can also be…

  • Tobacco Addiction

    Tobacco addiction is caused by a dependency on nicotine and habits formed by smoking or using chewing tobacco. With the…

  • Tonsillitis

    Tonsillitis is an inflammatory disease that occurs when your tonsils become infected by a virus or bacteria.