The pain in the abdomen a few days after menstruation is related to many factors, the main reasons are the following: 1, it may be caused by various diseases such as pelvic inflammatory disease, vaginitis. The woman’s pelvic cavity is stimulated to become congested after pelvic inflammatory disease, which will produce abdominal pain. 2, there may also be abdominal pain caused by abdominal cold, or often too much strain. The woman’s body is weak and often cold, which may directly affect their blood circulation, thus producing abdominal pain problems.