Answer: First I would like to say don’t over react. I would also suggest that you do not self-diagnose, but I realize that realistically that probably isn’t possible.

Red bumps can appear on the penis for many reasons. Even if you have not shaved or trimmed your genitals recently it is possible that the bumps are merely ingrown hairs.

Another possible explanation for red bumps are irritated or red moles. I know you said they appeared overnight, but many times I see people that get a negative herpes test and suddenly question whether the red bump(s) have been there all along.

If the red bumps are a result of herpes then you can swing down to your local lab testing facility and get a herpes test for under a $100 bucks (no insurance). Keep in mind there are two types of herpes, and if you have ever had a cold sore you can bet you will test possible for herpes simplex I. It is not life threatening and a very large percentage of the US population carry this virus without ever have symptoms.