Dysmenorrhea is a periodic hypogastric pain in the period of menstruation and menstruation, which often occurs in the pre menstrual and menstrual periods, incidental to a few days after the menstrual period. The lower abdominal pain is spasmodic and distended pain, which can radiate to the lumbosacral, the medial thigh and the perianal. Accompanied by pale, nausea and vomiting, abdominal or systemic chills, defecate frequency, pain when the collapse can be. The degree of dysmenorrhea depends on subjective feeling, and there is no objective standard, so the incidence of dysmenorrhea is different.
Two kinds of dysmenorrhea were divided into primary and secondary types. Secondary dysmenorrhea occurred 2 years after the menarche, and the age and course of dysmenorrhea in different diseases were different, and the occurrence of dysmenorrhea was different in the morning and evening.
There are many factors that cause dysmenorrhea, and the following are the following:
1. cervical canal stenosis
It is mainly the obstruction of the exodus of menstruation, which causes dysmenorrhea.
2. dysplasia of uterus
It is easy to combine abnormal blood supply with poor development of the uterus, causing uterine ischemia and hypoxia to cause dysmenorrhea.
3. abnormal uterine position
If the woman’s uterus position extreme retroflexion or flexion, can affect the blood patency due to dysmenorrhea.
4. mental and neurologic factors
Some women are too sensitive to pain.
5. genetic factors.
6. endocrine factors
Abdominal pain in the menstrual period is associated with the increase of progesterone in the luteal phase.
7. elevated levels of prostaglandin (PG) in endometrium and menstrual blood
Prostaglandin E2 (PGE2) acts on the contraction of the myometrium of the uterus to cause the dysmenorrhea. In the endometrium of patients with dysmenorrhea, the prostaglandin content in normal women was significantly higher.
8. excessive contraction of the uterus
Although the uterine contraction pressure of dysmenorrhea patients is basically the same as that of normal women (normal pressure is about 4.9Kpa), the duration of uterine contraction is longer, and it is often not easy to relax completely, so dysmenorrhea caused by excessive uterine contraction occurs.
9. abnormal contraction of uterus
Dysmenorrheal patients often have abnormal uterine contraction, which often leads to uterine smooth muscle ischemia, uterine muscle ischemia can cause uterine muscle spasmodic contraction, resulting in pain and dysmenorrhea.
10. gynecologic disease
Such as endometriosis, pelvic inflammation, adenomyosis, hysteromyoma, and so on. The birth of the contraceptive device in the uterus (commonly known as the birth control ring) is also easy to cause dysmenorrhea.
11. maiden menarche
The psychological pressure is big and sedentary leads to the poor circulation of Qi and blood, the poor operation of the menstrual blood and the love of cold drink food, which causes dysmenorrhea.
12. menstrual period
Strenuous exercise, cold clammy invasion, is easy to cause dysmenorrhea.
13. external environment
The air is not well stimulated by some industrial or chemical odor, such as gasoline, scented water and so on, which causes dysmenorrhea.