Also found in: Dictionary, Thesaurus, Medical, Encyclopedia, Wikipedia. Related to Elective surgery: urgent surgery, Emergency Surgery. SURGERY, med. jur. That part of the healing art which relates to external diseases; their treatment; and, specially, to the manual operations adopted for their cure. 2.
Acne is a common skin disease that causes pimples. Pimples form when hair follicles under your skin clog up. Most pimples form on the face, neck, back, chest, and shoulders. Anyone can get acne, but it is common in teenagers and young adults. It is not serious, but it can cause scars. No one knows exactly what causes acne. Hormone changes, such as those during the teenage years and pregnancy, probably play a role.
If you're almost a teen, chances are pretty good that you have some acne. About 8 in 10 preteens and teens have acne, along with many adults. In fact, about 17 million people in the United States have acne. Acne is so common that it's considered a normal part of growing from a kid to an adult.