Diseases and Conditions

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


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  • Woman touching her throat because it is sore

    Sore Throat

    A sore throat can feel irritated or scratchy with mild to burning pain. Most sore throats are caused by viruses,…

  • A man who doesn't feel well is sitting on top of his bed with his head in his hand

    Somatic Symptom and Related Disorders

    Somatic symptom and related disorders represents the physical pain and symptoms a person feels from psychological factors.

  • Doctor measures the blood pressure of a pregnant woman


    Preeclampsia is a condition women can get while pregnant. It involves an increase in blood pressure and signs of damage…

  • Close up of rheumatism / arthritis medical examination

    Rheumatoid Arthritis

    Rheumatoid arthritis (RA) is a chronic (lasting) inflammatory disorder. It causes swelling and pain in the lining of your…

  • An illustration of a typical ovary

    Polycystic Ovary Syndrome

    olycystic ovary syndrome (PCOS) is a condition that occurs when cysts form on a woman’s ovaries.

  • Swimmer’s ear, also known as otitis externa, is an irritation, swelling or infection in your ear. It can be caused by bacteria and fungus.

    Otitis Externa (Swimmer's Ear)

    Swimmer’s ear, also known as otitis externa, is an irritation, swelling or infection in your ear. It can be caused…

  • Piriformis Syndrome

    Piriformis syndrome is a condition that causes pain or numbness in your buttocks, hip, or upper leg when the piriformis…

  • Osteopenia

    Osteopenia is a condition that begins as you lose bone mass and your bones get weaker.

  • Non-substance Addiction

    A non-substance addiction includes things like gambling, sex, food, the internet, mobile devices, and shopping. It is also known as…

  • two hands wearing rubber gloves and feeling a woman's lymph-nodes in her neck to test for non-hodgkin lymphoma

    Non-Hodgkin Lymphoma

    Non-Hodgkin lymphoma is a form of cancer that happens when your white blood cells become abnormal. It can be fatal,…

  • A doctor bandaging a patients hand to prevent a skin infection


    Cellulitis is a skin infection caused by bacteria. It can spread to your lymph nodes and cause a blood infection…

  • Cystic Fibrosis (CF)

    Cystic fibrosis is a genetic disorder that causes mucous and sweat glands to behave abnormally. It can lead to damage…

  • close up image of a man's body suffering severe urticaria nettle rash.

    Exercise-induced Urticaria

    Exercise-induced urticaria is a condition that produces hives and other allergic symptoms.

  • Epilepsy

    Epilepsy is a disorder of the brain that causes seizures.

  • Senior man holds his hand to his throat in pain


    Dysphagia is a swallowing disorder that can result from multiple causes.

  • Baby sleeping in a position on his father’s arm to help treat colic


    Colic is when your baby cries for longer than 3 hours a day at least 3 days per week. It…

  • red and white blood cells traveling through a vein in the human body

    Blood Poisoning

    Blood poisoning happens when an infection enters your bloodstream and your body reacts to the infection.

  • A men bent over clutching his side in pain due to appendicitis symptoms.


    Appendicitis is an inflammation or infection in your appendix. It can cause pain and swelling, and the appendix may burst…

  • a tick sits on a leaf


    Babesiosis is a red blood cell infection caused by a parasite carried by deer ticks. Most infections happen in the…

  • woman putting drops in her eye

    Allergic Conjunctivitis

    Allergic conjunctivitis occurs when the clear, thin membrane that covers your eyeball becomes swollen and irritated. It can cause itching…