Stomach pain after 7 days of miscarriage is usually abnormal and may be caused by pelvic inflammatory disease or uterine residue. 1. Pelvic inflammatory disease: if a woman experiences stomach pain 7 days after her miscarriage, it is very likely to be due to the lack of attention to maintaining perineal hygiene or premature coitus, which leads to bacterial infection secondary to endometritis and pelvic inflammatory disease. 2. Uterine residue: If a woman has stomach pain accompanied by heavy vaginal bleeding 7 days after her miscarriage, it is very likely that she has uterine residue, and it is recommended that she go to the hospital as soon as possible, complete the ultrasound examination, and give her uterus a clean-up treatment if necessary. If you have any special discomfort after 7 days of miscarriage, it is recommended to go to the hospital as soon as possible.