The Retin-A doesn't attack bacteria, it changes how your skin works. Retin A is the acid form of vitamin A, known as tretinoin. It greatly increases cellular turnover and decreases your oil production. So, the comedons (the plugs that are made up of oil and dead skin cells) that clog your pores are pushed out and the bacteria have less food. In mild forms you can use these products continuously, and you really only see consistent results if you do so, but there are side effects. You shouldn't ever wax skin that you are currently treating with Retin-A; you must be very careful with harsh exfoliation (a rough cloth or like Freddy suggests in another post, a scrub with "beads"); and you are at much much greater risk of extreme sunburn and sun damage. You can easily avoid that with the sunscreen you should be wearing everyday anyway. You can find vitamin A in quite a few products in different forms, Retin-A is the acid form and is also sometimes listed as retinoic acid or All trans retinoic acid, but there are other forms of vitamin A out there. Does this help?
except working on the outside, you need to work on the inside as well. To avoid big pimples under the skin, you need to have a good diet. I know sometimes it could be difficult to eat well but do try to eat plenty of vegs and fruits.I have been using Retin-A 0.05% for a year now and my face has cleared out pretty well. The only problem is in that period of the month when I have some pimples. Sometimes are light but sometimes are those big things under the skin and they hurt. I was thinking if I switch to retin-A 0.1% would I have a chance of getting rid of all pimples?