<s>[INST] My left testicle has been sore for the last 24 hours. Ive also had weird feelings in my lower stomic and back. It doesnt hurt to urinate. I have taken aspirin and have put a cold pack down there to relieve the pain. I do play hockey and I was thinking that maybe I hit it some how and didnt realized it? I dont know. I have also noticed my sperm is greenish yellow. Ive had the same sexual partner for the last year and a half. Please help. [/INST] Hi, Considering the color, abdominal pain it can be urinary tract infection. Still, we can't exclude Sexually Transmitted infection (STI). You gave the history of sex. If it is unprotected sex we can think of STI and run a panel of STI investigation. Also, need to do urine culture sensitivity to rule out urinary tract infection. A pelvic ultrasound will help you diagnose the prostate related issue. Hope I have answered your query. Let me know if I can assist you further.  </s>