Suggest Treatment For Darkened Skin Around Mouth After Chemical Peel

Dear Sir, I am wheatish in colour but my skin is soft. In may 2009 i had few pimples and allopathy doctor suggested chemical peel. First time it was effective. Second time i was totally effected and my skin became darker specially at mouth portion almost black. i had used lot of creams and got further peels done and my skin became dry and got lot of pimples. Later since i felt my skin became allergic to allopathy i shifted to homeopathy and used for an year. now i skin is slightly bright and no pimples but the pigmentation at mouth portion specially at lip ends is not reducing. I thought of using ayurvedic parallelly and visited yesterday only Ayurvedic doctor and he asked me to use Evenshade cream and gave me few tablets for 15 days. I would like to know from you sir since my skin is very sensitive and even if i apply lemon it becomes darker at mouth portion, is it safe to use evenshade. I request you to reply to this sir. Thank you in advance