The main causes of painful uterine cramps include over-contraction of the smooth muscle of the uterus and irritation of the endometrium.
1. Excessive contraction of uterine smooth muscle: uterine tissue is mainly composed of smooth muscle, and contraction of smooth muscle leads to uterine spasms, and may also lead to compression of blood vessels interspersed in smooth muscle fibers and aggravate spasms due to ischemia and hypoxia, thus causing severe pain.
2. Endometrial stimulation: when the endometrium is stimulated by the endometrium can also lead to uterine spasms and thus lead to pain, the cause of stimulation, including menstrual flow, intrauterine foreign body, etc., the hormonal regulation of menstruation by the endometrium cyclic peeling, intrauterine foreign body, such as the birth control ring to stimulate the uterine lining, which may lead to uterine spasms and pain.
Uterine cramping pain may have other causes, when the uterine cramping pain, it is recommended to go to the hospital in a timely manner, improve the relevant examination, by the doctor to clarify the cause of the disease, for standardized treatment.