I have been using retin-a-micro yellow cream gel 0.1 for the last two years. the first six months of using this every night my skin got worse, more pimples and red peeling and itchy and it burns! but like my derm said it has to get worse before it gets better and she was right! recently i have been braking out with big juicy pimples you have to pop all over my cheeks, i talked to my derm and she said my skin has got used to it and ill have to go up a little bit stronger. a great thing i learned when putting it on at night is moisturize after shower wait half an hour then put a pea size of retin-a mixed in with a serum so its easier to spread and it soothes the skin! i use an olay serum which works great and your red marks which are probably dry patches like i had will soon go away. good luck