I started using tretinoin 6 months ago because my skin would get an occasional break out, I had black heads and bumps, I really just wanted clear skin all of the time. I was prescribed tretinoin 0.05 %. At first my skin was terrible and I was breaking out in places I had never even broken out before. My skin has definitely calmed down but im 6 months in and I still have broken out skin, with under the skin bumps and blackheads. How do I know when enough is enough and to move on versus sticking it out.