ForumsTopics & Posts abou...Acne ScarsTCA cross - how lon... Notifications Clear all Unless you have severe, widespread, and scarring acne, The Regimen is normally my suggestion for the most effective acne treatment.My suggested acne treatment Learn The Regimen → Learn The Regimen → TCA cross - how long after Retin-A?whoknew 08 MemberMember1(@whoknew08) Posted : 03/20/2017 3:34 am Hi everyone I'm using Retin-A cream. My skin is used to it, I don't have irritation, it's taking it really well.I'm thinking about TCA cross and I'm wondering how long should I wait after I stop using Retin-A? Quotebeautifulambition MemberMember1750(@beautifulambition) Posted : 03/20/2017 4:49 am A week or 2 before and after. You can always avoid just the areas you will tca cross and apply to the rest. Quote