The left side of the abdominal pain during intercourse is considered to be related to many factors: 1, may be the emergence of gynecological diseases, such as adnexitis, pelvic inflammation, endometritis and other diseases, when these diseases will lead to inflammation reaction. The violent collision during sexual intercourse can also cause the disease to become more serious, thus triggering pain. 2, it may be the follicular development and rupture of the follicular fluid from the body after the follicular fluid out of the peritoneal stimulation of pain and discomfort. 3, it may be in the coitus excessive force on the uterus and pelvic cavity to stimulate, thus the emergence of the pain. 4, it may be the result of other systemic diseases, such as Gastrointestinal diseases, liver and kidney diseases, and so on. It is recommended to go to the hospital in time for examination, if the pain is severe, it is best to carry out ultrasound examination and other aspects of the examination.