"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."