Prostate pain after sex may be caused by excessive sex, but also may be due to prostatitis, seminal vesiculitis and other diseases. 1. Excessive sex: If men have too much sex recently, the prostate is repeatedly in a state of congestion and swelling for a long time, causing pressure on the urethra and bladder opening, and indirectly stimulating the pelvic muscles, and then there will be prostate pain after sex. 2. Prostatitis: this disease is caused by pathogen infection, in some cases can be transmitted through the bloodstream, retrograde urethra and other channels, can be induced by a poor lifestyle, irregular sex life, unclean sexual intercourse, poor dietary habits and other factors, resulting in the patient’s perineum, pubic area discomfort, so, the patient will be after sex symptoms of prostate pain. 3. Seminal vesiculitis: the disease may be caused by infection by pathogenic bacteria such as Escherichia coli, Aspergillus, etc. Common routes of infection include upward infection, bloodstream infection, lymphatic infection, and secondly, it may be related to seminal vesicle tuberculosis. Patients will have symptoms such as perineal distension and pain, ejaculation pain and so on, so it can be manifested as prostate pain after sex. It is recommended that patients with prostate pain after sex go to the hospital, complete the relevant examinations, clarify the specific causes and then treat under the guidance of the doctor.