Common causes of abdominal cramps include endometritis, chronic pelvic inflammatory disease, tubo-ovarian inflammation, chronic cervicitis and other causes. 1. Endometritis: it is often manifested as abdominal cramps and lumbosacral pain during menstruation, but it is often accompanied by leucorrhea, menorrhagia, dysmenorrhea, fever and other symptoms. 2. Chronic Pelvic Inflammatory Disease (CPD): It can be characterized by prolonged abdominal pain, which may be aggravated after sexual intercourse or before and after menstruation, and may be accompanied by fatigue, leucorrhea, menstrual disorders, infertility, ectopic pregnancy and other symptoms. 3. Tubo-ovarian inflammation: under the stimulation of inflammatory factors, abdominal pain may occur, and the pain is often aggravated after exertion, sexual intercourse and menstruation, and usually accompanied by pain during sexual intercourse, fever, lumbosacral pain and other symptoms. 4. Chronic cervicitis: the symptoms of abdominal pain can occur, but the pain is usually aggravated during sexual intercourse, menstruation, defecation, usually accompanied by urinary difficulties, frequent urination, leukorrhea and other symptoms. 5. Other causes: there are many other causes of abdominal cramps, such as uterine hypertrophy, endometriosis, ectopic pregnancy, ovarian tumor torsion and rupture, cystitis, prostatitis and so on, can appear this symptom, need to consult a doctor in time for a clear diagnosis. If you have abdominal pain, you need to consult a doctor and follow the doctor’s instructions to improve the relevant diagnosis and treatment program to avoid aggravation of the condition.