Endometriosis is one of the common gynecological diseases. The typical symptoms are secondary dysmenorrhea, which often leads to ovarian chocolate cysts.
It is generally believed that the cause of endometriosis may be that the endometrium is brought into the abdominal cavity by menstrual blood flow, implanted in the peritoneum or other organs such as ovaries, fallopian tubes, etc., and related factors include advanced age, economic production, genetics and Environmental factors and other factors. It has also been found that tights have a relationship with endometriosis.
Experimental measurements show that the intrauterine pressure of the first 3 days of the human menstrual cycle is at a peak of about 40-70 mmHg, which is significantly higher than the intra-abdominal pressure, which is caused by uterine contraction. At this time, the uterine fallopian tube interface, which is as fine as a pinhole, tends to close, so there is no menstrual reflux. However, the uterine wall is loose between the two contractions, and the intrauterine pressure is equal to the intra-abdominal pressure. If the intra-abdominal pressure suddenly decreases, the pressure change from the uterine cavity to the fallopian tube can occur, and the blood accumulated in the uterus can be accumulated. And the shed endometrium reverses into the abdominal cavity. According to this reasoning, the tights that are worn make the intra-abdominal pressure slightly increase, and when the clothes are undressed, the intra-abdominal pressure can be lowered. In this case, the uterine fallopian tube interface is loosened between the two contractions, and the menstrual blood can be reversed. This reasoning has been confirmed by various experimental methods.
Epidemiological investigations have also shown that endometriosis is more common in developed countries such as Western Europe, the United States, etc. Women in these countries wear tight clothing that increases abdominal pressure, with an incidence rate of 10%. The incidence of Indian women is only 1-2%, which is related to their lack of tights.