What Causes Red Bumps On Penile Shaft After Masturbation?

Posted on Thu, 17 Dec 2015

Medically reviewed by Ask A Doctor - 24x7 Medical Review Team

Thu, 17 Dec 2015 Answered on

Thu, 7 Jan 2016 Last reviewed on

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.

Above answer was peer-reviewed by : Dr. Prasad