"i usually had mild acne, and a few leftover acne marks. during the summer, i broke out more than usual and it got to a point were i had 3 very huge cystic pimples. a doctor recommended doxycycline. i took it for 3 months. at first, it was breaking me out (as everyone said it should), and really, it kept breaking me out until the month mark (a little after that), and by then i had so many leftover acne marks. i keep thinking that i could&#039;ve waited for the 3 terrible cystic pimples to fade and i would&#039;ve avoided getting all the leftover marks. i&#039;m off doxycycline for about a week now. its going well, i&#039;m not breaking out more than i was on the medication, just tiny zits here and there that fade quickly. assess your risk/benefit ratio before."