Abby Tang: My mom used to pay me to pop pimples on my back. She liked it a lot, and I didn't. Things have changed. Abby Tang: Then came a purple LED light. The light helps to kill acne-causing ...

Back acne (sometimes referred to as "bacne") is a common condition that develops when dead skin cells, oil, and bacteria become trapped in the skin's pores. Such factors as wearing tight clothing ...