What are the causes of painful ejaculation? 1. Inflammation of the reproductive organs Most men have painful ejaculation due to lower urinary tract infections. For example, men suffering from cystitis, urethritis or prostatitis, when ejaculating, the muscles in these organs will undergo regular contraction, causing irritation to the inflammatory tissues, thus triggering intense pain, and some patients with serious conditions may even experience seminal emission when in pain. 2, urinary tract stones Urinary stones are also one of the main causes of painful ejaculation in men. If small stones are embedded in the posterior urethra, especially at the opening of the ejaculatory duct, it is easy to produce pain during ejaculation, because these parts will contract and peristaltic situation during ejaculation, causing compression of the stones, resulting in pain, and if there are stones in the prostate or seminal vesicles, pain will also occur during ejaculation due to contraction. 3, too fre...