<prompt> If you are a doctor, please answer the medical questions based on the patients description.I am 45-years old. I once 5 yrs ago, had blood in my semen during masturbation. It went away. Now it came back. I suspect that it was due to accidental pinch on one of the nerves in the scrotal sack. I for now decided to slow down on masturbation anyhow, just to see what happens in the next 2 weeks.  <response>: Degree understand your concerns went through your details. If you find blood with semen during masturbation or sexual intercourse, I suggest, you should consult a physician. Prostrate related disorders has one symptom such as this. Take care. If you still need my assistance in this regard, please use this link. Please remember to describe the whole problem with full detail. Hope this answers your query. Available for further clarifications. Good luck. 