Hello
welcome to health care magic, I have gone through your question very diligently and I will try to help you out in best possible way.
At the outset, I would like further information for better assessment of the condition like
If possible please upload me a photograph?
Since how long it has been there?
Are you sexually active?
I would advise you to go for a battery of investigation like CBC,
ESR, CRP,
liver function test, blood sugar,
VDRL test and urine culture if need be culture and microscopic examination of the penis discharge.
You may require a course of antibiotics under medical supervision.
Meanwhile wash it with antiseptic soap or solution and keep it clean and moisturised
maintain good hygiene.
Thanks for your question please do write back to me with all the details I have asked for, so that I will be able to tell you more accurately.
Best wishes