We consulted a top dermatologist to uncover why chest and body acne occur—and how you can treat them effectively for clear skin that lasts.

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 ...

resulting in a worsening of your acne or more acne popping up nearby. If inflammation worsens as a result of trauma from ...