After coitus, the stomach especially painful, considered because of the vagina and abdominal cavity stimulation during sex. If the sexual life time is long, the abdominal cavity is in a state of tension, pain after sex is a normal phenomenon, general rest for a day or two, pay attention to abdominal massage and so on can relieve the pain symptoms. But if there are gynecological inflammation, such as pelvic inflammatory disease, cervicitis, etc., after intercourse will also cause abdominal pain, which need to go to the hospital for colposcopy, gynecological ultrasound, it is best to find out the cause of the reason under the guidance of the doctor reasonable medication. If you have gynecological inflammation, it will aggravate your condition and affect your body’s recovery. If you have gynecological inflammation, you need to use reasonable medication, you can use antibiotics to treat it and also suggest local vaginal medication, which can promote the recovery of your condition. If you are pregnant, coitus can also cause abdominal pain, leading to abortion aura and so on, you need to ultrasound to rule out the possibility of abortion.