<s>[INST] I have had blood in my semen. It happens after a night with my girlfriend. This is the second time it happened. When I was with my girlfriend, I was restricted from ejaculating, for about 3 hours or something. It went away after three days the last time. What could this be? [/INST] Degree understand your concerns went through your details. Occasional blood seen with semen can be seen as normal. But if the problem reoccurs, do consult a physician. If you require more of my help in this aspect, please use this URL. http://goo.gl/aYW2pR. Make sure that you include every minute details possible. Hope this answers your query. Available for further clarifications. Good luck. Take care. </s>