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A 18-year-old male asked:

Hi, i have a flat green patch on the head of my penis, its about 1cm in diameter. it has never hurt or itched, what could it be?shall i just leave it?

2 doctor answers6 doctors weighed in
Dr. Robert Killian
General Practice 28 years experience
Syphilis: In general a non-tender greenish lesion represents a syphilis sore. I would advise you to get to a doctor and be tested.
Dr. Heidi Fowler
Psychiatry 25 years experience
Get eval: This can't be diagnosed with the information that is available. A history, physical examination & other studies may be needed to determine cause/causes.

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India
A 18-year-old male asked:

Hi, I have a flat green patch on the head of my penis, its about 0.5 mm it has never hurt or itched, what could it be?

2 doctor answers6 doctors weighed in
Dr. Joseph Bark
Dermatology 49 years experience
Green penis: Many problems in dermatology need to be looked at by the dermatologist to be diagnosed. Yours is certainly one of those because the color green is very unlikely in the human system. You must see a dermatologist.
Last updated Oct 31, 2015

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