The stomach pain during menstruation may be caused by retained placenta, uterine contraction, pathogen infection and so on.
1. Retained placenta: If the placenta is not completely detached during labor, but part of it remains in the uterine cavity, it may cause uterine infection and abdominal pain after a long time.
2. Uterine contraction: after delivery, the uterus needs to return to its original state by uterine contraction, and uterine contraction will cause lower abdominal pain.
3. Pathogen infection: due to mycoplasma, chlamydia and other pathogenic bacteria infection, it will lead to pelvic inflammation, which will cause lower abdominal pain.
There may be other causes of stomach pain during menstruation, so we suggest that patients actively seek medical attention to clarify the cause and carry out regular treatment.