The pain in the abdomen after ejaculation may be caused by chronic prostatitis, seminal vesiculitis, epididymitis and other reasons. 1. Chronic prostatitis: it may be caused by drinking too much alcohol for a long time, not paying attention to local hygiene and cleanliness, and sitting for a long time. Due to the stimulation of inflammation, there can be pain in the abdomen after ejaculation, urethral burning, urine residual leaking and other uncomfortable symptoms. 2. Seminal vesiculitis: mainly due to the genital organs are infected by germs triggered by the inflammation of the disease. Due to the stimulation of inflammation, there can be pain in the abdomen after ejaculation, urinary discomfort, frequent urination, urinary urgency and other uncomfortable symptoms. 3. Epididymitis: due to the stimulation of inflammation, sexual life will aggravate the local congestion, resulting in local tissue pressure, pressure release after ejaculation, which can appear the phenomenon of abdominal pain. It is recommended that patients with abdominal pain after ejaculation go to the hospital in a timely manner, and follow the doctor’s instructions for treatment to avoid delaying the condition.