Vacation means menstruation. Hidden pain in the abdomen after menstruation may be caused by not paying attention to hygiene, catching cold, having sex during menstruation, pelvic inflammatory disease, etc. According to the reasons, it can be treated by keeping private hygiene, keeping warm, avoiding having sex during menstruation and medication. 1. Don’t pay attention to hygiene: it is recommended to change underwear and sanitary napkins frequently, and wash underwear in the sun and sterilize them. 2. Cold: It is recommended to keep warm, add more clothes, and avoid staying in air-conditioned rooms for a long time. 3. Sex during menstruation: the stimulation of sex may cause the uterus to contract, involving the peritoneum or pelvic nerves, and symptoms of abdominal distension and pain may occur, so sex should be avoided during menstruation. 4. Pelvic inflammatory disease: there may be vague pain in the abdomen, can be treated with cephalosporin antibiotics, such as cefotaxime, ceftriaxone sodium, etc.. After the end of menstruation, a vague pain in the abdomen, there may be other conditions, you can go to the hospital to improve the relevant examination to clarify the cause and take appropriate measures. The above medications should be used under the guidance of a doctor, avoid self-medication.