The pain in the stomach and anal swelling after intercourse may be caused by gynecological inflammation, such as pelvic inflammatory disease, endometritis or vaginitis, which are not cured and are easily spread under the stimulation of intercourse, resulting in stomach pain and anal swelling. It is advisable to take timely treatment after this situation. You can perform ultrasound examination to understand the situation of the uterine adnexa and pelvis, and take oral anti-inflammatory drugs, such as the Chinese medicine Kunfu Kang capsule or Vajra Vine granules, for four weeks as a course of treatment. The pain in the stomach and anal swelling after intercourse is not excluded because of the pain caused by the pelvic stagnation caused by stimulation, you can reduce the number of intercourse, and there may be significant improvement after rest.