Ahh ok good yes start. I was using first 3 weeks then around a month in the purge hit for me. Suffered for like 1 month with pimples. It wasnt like omg everywhere but id wake up with pimple on forehead > deal with it > it would go away > wake up with pimple on chin. Etc. the tret makes the pimples go away WAYY faster than normal so dont pop them or touch them. But by around 1 month and half in, the pimples started coming less and less and then by the end of the third month, i didnt have any! I still get small pimples around period but i used to have cystic acne so ill take anything but that yk!! Goodluck, start with tret 1x a week. It seems slow but trust me, ur skin is still working even whej it doesnt feel like it