Conditions list medically reviewed by George Krucik, MD, MBA
Learn about what causes allergies, the different types of allergies, and how they're treated.
Fifth disease is common in children. It causes a red rash on the arms, legs, and cheeks, and a virus called parvovirus B19 causes it.
Learn about sarcoidosis and its causes, symptoms, diagnosis, treatment, and potential complications.
This feature is for informational purposes only and should not be used to diagnose. Please consult a healthcare professional if you have health concerns.