One quick question: Have you recently had any type of trauma or injury in that area? Like a fall, or maybe even a long bike ride on a hard seat? Or perhaps even some rough sexual activity - ??
I’m not a Dr., but info I found says any broken blood vessels anywhere along the path of the genito-urinary system can cause blood in semen. Often no cause can be found. It CAN be a warning sign of cancer, which I’m sure is a scary thought for you, but that’s rare. You didn’t say how old you are, but for men over 40 with frequent blood in ejaculate, only 4%-6% are found to have cancer. If this turns out to be just a one-time event, it’s prbly less likely there’s any serious prblm.
Your best bet is to see your reg Dr. 1st, who’ll prbly examine you, check the prostate & order a cpl tests, and if no immediate cause is found, may refer you to a Urologist. You can describe seeing blood in ejaculate without specifically mentioning masturbation, if speaking of that makes you uncomfortable. Best of luck to you & please check back in & let us know what’s found - your findings could help someone else in a similar situation.
How is this going? Is it cleared up? I think Bonzo guided you really well here.