Since it's not responding to normal treatment modalities or tacrolimus , one who has advised u for these medicines, they must have told you about the diagnosis. Anyways get it ruled out for vitiligo , in case u want to meet Dr.Suruchi Puri who is exclusively treating vitiligo for last 20 years with lot of latest treatment modalities, u can visit our once . U can also visit the website www.drsuruchipurimakeovers.com . U can book an appointment also at 9868 080340 or else visit personally at B-2/31 janak Puri . Meanwhile continue the treatment suggested to you by your doctor . Hope to see you coming out of this problem and our best wishes are with u . Don't get dishearten as Treatment is there even if it's vitiligo