Thank you very much for your replies. i am sure that they are flat warts because i had been to doctor and i am using Retin-A. i have also been advised glycolic acid. is it faster than retin-A? Retin-A which i am using now is for acnes(0.50mg retinoic acid/1g gel). can it help my warts? if not could you please advise me a good retin-A medicine for warts.