acne
"I have had minor acne since sophomore year of college (now graduated). I'm afraid my dermatologist has not been good about following up with me long-term, so I've probably been misusing the medication for a while. 
It clears up my clogged pores really nicely (yay!) but there are still lots of blackheads and sometimes the clogged pores stay there a long time. I'm a skin picker (bad) so that has aggravated my acne from touching my face and caused some minimal scarring which I can easily cover up with makeup. One of my least favorite things about this medicine is that, although it clears most of my clogged pores, I have noticed an increase in painful cystic acne around hotspots (potentially due to the onset of hormonal acne)."