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Diseases and Conditions

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

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  • Dermatologist uses magnifying glass to examine a mole on the back of a male patient

    Squamous Cell Carcinoma

    Squamous cell carcinoma is a common form of skin cancer caused by too much exposure to ultraviolet (UV) radiation.

  • Stomach Cancer

    Stomach cancer is the growth of cancer cells in the lining and wall of the stomach. It’s also called gastric…

  • Woman sitting on a couch holding stomach in pain

    Stomach Flu (Gastroenteritis)

    Gastroenteritis is a medical term for a stomach virus. Many people call it the stomach flu. It can strike anyone…

  • Strabismus

    Strabismus is an eye disorder. It affects the muscle control in your eyes. The eyes don’t line up properly. Instead,…

  • Doctor checking woman’s throat with a tongue depressor

    Strep Throat

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

  • senior man receives injection from medical worker with gloved hands

    Stroke

    A stroke is a medical condition that occurs when the blood flow to your brain stops.

  • Stuttering

    Stuttering is a condition that affects a person’s ability to speak smoothly. It can cause them to repeat words, parts…

  • closeup of a sty on a child’s eye

    Sty

    A sty is a painful, red bump that forms on the edge of your eyelid. It may look like an…

  • Substance Abuse

    Substance abuse can happen when products aren’t used in the right way. Prescription medicines, illegal drugs, tobacco, and alcohol can…

  • Sudden Infant Death Syndrome (SIDS)

    Sudden infant death syndrome is the unexplained reason a baby under 1 year old dies while sleeping. There are no…

  • Syphilis

    Syphilis is a serious infection passed from one person to another through sexual contact. It is caused by a bacteria…

  • Teeth Grinding (Bruxism)

    Teeth grinding, also called bruxism, is the conscious or unconscious grinding or clenching of teeth. It happens most often in…

  • Tennis elbow - tear in the common extensor tendon of the arm

    Tennis Elbow

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

  • Male doctor and testicular cancer patient are discussing about testicular cancer test report.

    Testicular Cancer

    Testicular cancer is the most common type of cancer in young and middle-aged white men, but it can be treated…

  • Man sitting on an exam table being counseled in a doctor’s office

    Testicular Torsion

    Testicular torsion happens when a man’s testicles rotate and the spermatic cord becomes twisted. This can happen at any…

  • Thalassemia

    Thalassemia is a group of inherited blood disorders that prevent your body from producing the amount of hemoglobin it…

  • Baby sticking out tongue with white coating from oral thrush

    Thrush

    Thrush is a yeast infection that occurs on your tongue and the lining of your mouth.

  • Thyroid Nodules

    A thyroid nodule is a lump in the thyroid gland in your neck. More than 90% of them are not…

  • Tick-Borne Relapsing Fever

    Tick-borne relapsing fever (TBRF) is a bacterial infection spread by ticks. It shows up as repeated episodes of fever, headaches,…

  • smiling school children stand against a fence on the playground

    Tics and Tourette Syndrome

    Tourette syndrome causes a person to involuntarily make repeated twitches, movements, or sounds called tics that begin in childhood.

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