The presence of mild pain in the left lower abdomen after intercourse may be caused by a number of factors. For example, if intercourse is performed during ovulation, it may stimulate the discharge of follicles, and the follicular fluid may enter the pelvic cavity and cause abdominal pain in the abdomen and even in the lumbosacral region. For example, if you have intercourse in the middle or late menstrual period, there will be a luteal secretion period and there may be slight pain caused by the stimulation of intercourse. If the intercourse is stimulated by excessive force, there may also be abdominal distension and pain. It is recommended to observe that as long as the abdominal pain is not severe, it will generally subside within three days. If it turns into severe abdominal pain, it is recommended to go to the hospital to register with the gynecologist and have an ultrasound examination to rule out any luteal rupture, because there is a chance of massive bleeding from luteal rupture, which affects the health of the body.