<s>[INST] I am a 40 Year old married man. I had a vassectomy 10 years ago, and i still use condoms. This is not a joke. I saw blood in my seemen after I masturbatsd, then felt pain between my hips, and lower stomach. The pain only lasted a little while. I havent abused myself, or took too long. I did nothing strange, or crazzy. Is this normal or am I in trouble? [/INST] this might be due to ureteric stones or prostatitis ( inflammation of the prostate) .. you need to have a pelvic ultrasound to diagnose the exact cause and treat it.. </s>