Dysmenorrhea starts 5 days before menstruation

A small number of female friends will start to suffer from dysmenorrhea five days before their period, and the degree of dysmenorrhea varies from person to person. Many female friends cannot work or study well when they have dysmenorrhea, and some even have to stay in bed and cannot even eat many foods. This is a more serious type of dysmenorrhea and needs to be cured as soon as possible.

(82%) It gradually decreases after the age of 30 to 35, stabilizes at around 40% in the middle of the reproductive age, and then even lower, maintaining at 20% at the age of 50. The start of sexual life can reduce the incidence of dysmenorrhea. A five-year follow-up survey of 19-year-old Swedish women showed that the incidence of dysmenorrhea dropped from 72% to 67% by the age of 24. The severity also decreased.

Childbirth is another important factor. The incidence and severity of dysmenorrhea in women with a history of full-term pregnancy and childbirth are significantly lower than those in those without a history of pregnancy and those who are pregnant but have a spontaneous abortion or induced abortion. This is because the adrenergic nerves that innervate the smooth muscle cells of the uterus almost disappear near full term, and the level of uterine norepinephrine also decreases; after delivery, these nerve endings only partially regenerate, and the level of uterine norepinephrine cannot return to the pre-pregnancy level.

This change in uterine neuromuscular activity after full-term pregnancy can explain why dysmenorrhea is reduced or disappears after full-term delivery, but there is no such change in women who have had a miscarriage. In addition, women who have early menarche or long and heavy menstruation may experience severe dysmenorrhea. The incidence of dysmenorrhea is significantly reduced in those who take birth control pills. Dysmenorrhea also shows certain family characteristics. The mothers and sisters of those who suffer from dysmenorrhea often suffer from dysmenorrhea. The degree of dysmenorrhea is reduced in those who smoke. Education level and physical activity were not associated with dysmenorrhea.

Other studies have shown that special occupations and working environments are also related to dysmenorrhea. Women who have long-term exposure to mercury and benzene compounds (even at low concentrations) have an increased incidence of dysmenorrhea. Cold working environments are also related to dysmenorrhea.

Mental factors: The relationship between mental factors and dysmenorrhea has been discussed over the years, with inconsistent results. Some people believe that mental factors are also important in women with dysmenorrhea, who often show poor self-regulation, depression, anxiety, and introversion. Those with severe dysmenorrhea are more feminine in terms of interests and emotions than those without dysmenorrhea. Others believe that psychological factors only affect the response to pain, rather than being pathogenic factors.