azelaic acid can enhance the effectiveness of tretinoin! I gave my skin time to adjust to the tretinon before introducing any other actives! and OFC consult your derm first!!! #tretinointips #tretinoinjourney #skincaretips #skincareduos #skincarecombos #bestskincombo #bestskincarecombination #azelaicacid #peachslices #treatingacnescars