The 50 year old man has seminal emission may be a normal phenomenon, or it may be caused by prostatitis, seminal vesiculitis and other reasons. 1. Normal phenomenon: 50-year-old men have semen leakage, mainly due to a long time without sex, when the semen reaches the saturation state, then the phenomenon of semen leakage is prone to occur. 2. Prostatitis: Prostatitis can increase the secretion of prostatic fluid due to inflammatory stimulation and swelling of the perineum. Inflammation can make the sexual organs obviously congested, thus increasing the number of nocturnal penile erections, prolonging the duration of erection, and the degree of erection is more obvious, leading to the occurrence of seminal emission. 3. Chronic seminal vesiculitis: seminal vesiculitis is related to pathogenic microbial infections, which can be induced by alcoholism, excessive sex, colds, horseback riding and other factors. The patient will have perineal pain, frequent urination, urinary urgency, bloody semen and other symptoms. There will also be seminal emission, premature ejaculation, low libido and other symptoms. The phenomenon of spermatorrhea in a 50-year-old man, after excluding physiological reasons, should go to the regular hospital in time for relevant examinations, after clarifying the cause of the correct treatment.