Is it possible that I got blue balls by cumming when I was semi-erect?

it is more likely that you simply were possibly masturbating too roughly if you were semi erect.

the source of ‘blue balls’ is not coming at all for an extended period of time.

medically speaking it is possible to slightly injure your organ while masturbating- kind of like a very minor bruise- chances are this is what is happening. the solution- leave your parts alone for a week or so and you should be good as new- HOWEVER- none of us on line can truly diagnose what is happening to you personally, so if you feel that you are injured in some way- GO TO YOUR DOCTOR AND GET CHECKED OUT.

Never lie to doctors. Most stupid thing you could choose to do.

Highly unlikely! Blueballs is an afflication caused by not ejaculating. Usually this happens when you have an uncaring significant other that refuses or is unable to finish the job or you are unable to climax for some other reason (e.g., inebriation).

To think like a blueballer and understand their plight, I often masturbate for an hour or more stopping whenever the urge to ejaculate arises. The throbbing in my scrotum is severe and if I listen carefully, I can actually hear my testicles moaning.

I recently read a pretty funny story about blue balls at [link removed]