Even if you don’t think it’s something serious, a rash on your penis can affect your health in different ways. See your doctor right away if you have the following symptoms:
Go to the emergency room if you have a rash on your penis and a fever. This could signal an allergic reaction or severe infection.
The rash is painful
It’s on other parts of your body too, appears suddenly, or is spreading quickly (these are signs of an allergic reaction)
The rash looks like blisters, or is turning into sores
Your penis feels warm or swollen, or the rash crusts over
The rash leaks green or yellow fluid
A red streak appears on your penis