Dear Doctor, Please let me know your suggestion for the following Background: I am male 45 and my mustache got few white hairs (approximately 1 in 200)initially. I used the herbal and indica hair die on my mustache since from six months.recently it creates burning sensation and creates white patches (not 100 % white) on my mustache skin, so avoided the dye and no dye application since from six months.One of the doctor suggested keraglo men tab no.30 and Revlon hair die for mustache ( since my head hair is good in black color only). My question is 1. why I am not getting my skin back to normal color even avoid the dye applications. 2. Whitened patched skin converts all my black hairs in mustache to white, can t I get it back the black color hair with normal skin?