<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have had unprotected sex the other day and noticed the same day within hours that I have what almost looks like a rash on my penis on my foreskin, it does not itch nor is it painful. And now I have a lot of small white bumps as well. I keep it as clean as possible.  <response>: Thanks for asking in Chat Doctor forum In short: Unprotected sex with unknown person is dangerous to healthExplanation: As per your explanation it may be simple mucosal erosion which sometimes occur on glans due to Chat Doctor. Your white bumps may be sebaceous gland visible on your glansscrotum. These are harmless as such, and you can consult dermatologist for this if you are not convinced. Give rest for 2-3 days, I think your rash will subside by itself otherwise visit a dermatology and undergo test for STD. Good luck 