Abdominal pain after sex is a common concern that can range from mild discomfort to intense cramping. This condition, often called postcoital pain, may occur due to temporary muscle contractions, deep penetration, or underlying health issues. One significant cause is uterine fibroids, noncancerous growths that can create pressure and irritation during intercourse. USA Fibroid Centers explains that fibroids near the cervix or uterus can trigger cramp-like pain or pressure after intimacy.