Healthy retirement
Learning Center
Hepatitis A
This contagious liver infection is caused by a virus. Learn more about its symptoms, treatment and prevention, including the hepatitis A vaccine.
Tetralogy of Fallot
These four heart problems present at birth change how blood flows through the body. Know the symptoms and treatment.
Nightmare disorder
Nightmare disorder involves disturbing or scary dreams that awaken you, causing distress or preventing adequate sleep.
Social anxiety disorder (social phobia)
Learn more on this disorder where everyday interactions cause significant worry and self-consciousness because you fear being judged negatively by others.
Drug addiction (substance use disorder)
Drug addiction affects your brain and behavior to the point where you can't control your use of legal or illegal drugs, even when you know they cause harm.
Acne
Learn more about this common skin condition, including causes, treatments and simple skin care steps you can do at home to help control it.
Hydronephrosis
Learn about this condition that occurs when urine doesn't drain properly from the upper urinary tract, leading to kidney swelling.
Broken collarbone
This common injury is usually the result of falling, playing sports or being in a traffic accident.
Ehrlichiosis and anaplasmosis
Learn how to prevent and treat the tick-borne diseases ehrlichiosis and anaplasmosis.
Temporal lobe seizure
These seizures begin in the temporal lobes of the brain. They can trigger a variety of symptoms such as odd feelings, fear and unresponsiveness.
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