I had a small round red patch on my red part of penis what does it means and how to cure it?i want a clear advice?

Red patch on penis: A small flat or slightly raised patch on the penis could be either a yeast infection or an early herpes simplex blister. A small depressed or ulcerated red patch could be either herpes simplex lesion or syphilis. Best to get patches on the penis checked.

Most rashes...: ....Need to be seen by a doctor to be properly diagnosed. You have also given very few details; does it hurt? Does it itch? Is it weeping? How long has it been there? Based on what you've written it could be dry skin, ringworm, an std, impetigo, or many other problems. You need to see a doctor.

Hard to say: Might be a wart or other std. Should be evaluated by a dr--either at county health dept's "std clinic, " your dr, or a urologist.