Moles are skin growths, most people have them. Nevus is an unusual mole or a birthmark. Have them checked if they should change in size or color. READ MORE
Mitral valve prolapse (MVP) occurs when one of your heart's valves doesn't work properly. Problems are rare. Learn about symptoms and treatment. READ MORE
A miscarriage is the loss of a pregnancy during the first 13 weeks of pregnancy. Read about symptoms and how to cope if you've suffered a miscarriage. READ MORE
In mild cognitive impairment (MCI), you have more memory and thinking problems than others your age, but they don't interfere with your everyday life. READ MORE
Migraines are pulsing or throbbing headaches in one area of the head. Learn about other symptoms, what triggers migraines, and how to treat them. READ MORE
Methamphetamine (also known as meth or crystal meth) is a very addictive drug. Read about the signs of meth addiction and health problems it causes. READ MORE
Metabolic syndrome (also called insulin resistance syndrome) is a group of conditions that put you at risk for heart disease and diabetes. Read more. READ MORE