What Causes Red Bumps On Penile Shaft After Masturbation?

Posted on Thu, 7 Jan 2016

Question: I have been tested for herpes multiple times. Each time came back negative. However, sometimes after masturbation I get a single red bump on the left side of my penis shaft. I was treated for syphillis in August, and it's near to spot that I had a chancre. Even though I tested negative for herpes, I still was prescribed valtrex. No pain. No itching. And it doesn't even look like a herpes blister. Not an ingrown hair either, I don't have hair there. What could it be?

Answered by Dr. Dr. Rahul Kumar (36 minutes later)

Brief Answer:
photograph required

Detailed Answer:
Hello
Thanks for the query.
Can you please upload a photograph of the involved area.
This will help me in giving a closer diagnosis.
Herpes usually presents with blister formation and it has no relation to masturbation.
It can be friction induced dermatitis.
Waiting for your response.
Thank you.

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Above answer was peer-reviewed by : Dr. Prasad