 [ Symptoms ] hi i have an enquiry mostly every morning when i wake up and look in a mirror i see bright white marks on my front two teeth they do dissapear after 3 4 hours but then again next morning they re appear i always think for some reason that its cos i sleep with my mouth open and breathe in from my mouth could you please tell me why these marks appear and how i could prevent the white marks from appearing every morning thanks in anticipation<positive_smiley> [ Disease ] hi this is from webmd your doctor can usually make the diagnosis of vitiligo during a physical exam there is no known way to prevent or cure vitiligo however several methods including cosmetics re pigmentation using uv light therapy corticosteroid creams depigmentation of unaffected skin areas and skin grafting can be used to improve the appearance of skin severely affected by vitiligo some people go through there whole life with this they even get it on there faces i do not think there was a cure but as you can read there is a chance but on your penis are you a naturist by any chance good luck