You may never know. Acne often flares without explanation. Acne on the trunk usually requires at least one systemic medication. If you're a female, the oral contraceptive pill may clear you if it's right for you. Or a combination of topical benzoyl peroxide and a systemic antibiotic for a while may be all you need to get clear. Acne's not curable but eventually remits. Best wishes.
How do I get rid of acne scars in my forehead and pimples on my chest? I always had clear skin but for the past 4 months I've been getting breakouts
Acne scars. One important factor is prevent new scars-get your acne under control. Find a dermatologist to tackle that with you. Most treatment to improve the appearance of acne scars use special technology to remodel the skin. The device I use to treat acne scars is called ematrix--see for info: http://www.Smacboca.Com/e-matrix-sublative-rejuvenation.Html other options include fractional lasers or subscision. Read more...