###Human: There is milky discharge from penis with pain in testicle. Please help. ###Assistant: Hi. I can understand your concern for your symptoms. Yes, infection should be ruled out. If you had unprotected sex with someone, then we can think of STD. If yes, give more details for investigation. If not, it can be other bacterial infection. Retrograde ejaculation can also cause this kind of discharge. Do a urine complete investigation for better understanding and treatment regime.