instruction: hello doctor I have a discoloring on skin of penis why
output: hello the condition you are presenting is hypopigmentation of penile skin relating to penile vitiligo its an autoimmune condition vitiligo can be present in other parts of skin or hairs also turning the color light or white it is not related to any studs but if any history of injury itching is present kindly do mention and for treatment of this hypopigmentation few ointment like tacrolimus ointment has found to be effective other than this you can also get help with light therapy both of these will decrease the spread and density of vitiligo thyearoid profile for autoimmune disorder do mention from how many days if any injury has occurred or not any prior infection