Hello respected Sir/Madam I got a patch like red thing on my penis tip. It was itching when touched to clothes. It disappeared after someday. Then it occurred again. I took medicine from skin doctor for a weak I recovered but two days. After medicine course it again occurred on penis tip. I had an unprotected sex 18 months ago with an unknown partner. But 3 months ago I also had h.i.v test but they were normal. Then what had happened .the patches are occurring some days after. I am worried sir .plz suggest me some thing .plz suggest me doctor. And what problem it is. Is it some thing worry abt. please sir I am very depressed.