Patient: I have a painful blister that occasionally forms at the opening at the end of my penis. In a way it feels like a cold sore with its sharp tingling pain. It only hurts when you touch it. I am not sure if it running my underwear or because of sex. I do not think it is an std as me and my wife are only sexually active with each other. I have photos.
Symptoms: Painful blister (or unopened sore) right at the opening of my urethra.
Doctor: Hi .Thanks for your question, clear picture and history saying about monogamous relation and the blister as you explai ned.As you may know the penis is the only structure in the body that is erectile and this is possible as it is having blood-filled spaces.The one that appears at the tip of your penis is a widened blood space and it is not any disease.Be assured, do not worry and bother.Enjoy your life.