Acne
"I am a 24 year old male and have semi oil skin. Never had acne until after high school around 20 years old so I guess you can call it adult acne. 
Anyway, I was dealing with cystic acne on my chin, cheeks, jawline and even some times on my nose. It was considered mild-moderate but still very uncomfortable coming from 20 years of a completely clear face. I would have anywhere from 6-8 decently sized cysts on my face at any given time. For almost 5 years I tried everything all sorts of washes and crap I read online which none worked. Finally went to a derm 3 months ago and got Bactrim 800-160 within a week my acne cleared and has been 99.9% gone ever since taking it twice a day every day."