Stomach pain on the fifth day of menstruation

Every woman will have some physical conditions during her menstrual period. There will be many problems during menstruation, such as heavy menstrual bleeding and dysmenorrhea, which is what we often call stomach pain. A normal menstrual period is about a week. During the menstrual cycle, women's endometrium sheds and a large amount of toxins and dirty blood are discharged from the body. Generally, the amount of blood will be very heavy within 2-4 days, and there will also be dysmenorrhea and stomach pain.

Menstruation is a physiological cycle that occurs in some fertile female humans and in chimpanzees and other hominins. Cows, mares, female camels, sows, and ewes also menstruate, and some mammals experience estrus cycles. In women of childbearing age and female primates, the endometrium undergoes cyclical changes every month or so, with autonomous thickening, blood vessel proliferation, glandular growth and secretion, and endometrial collapse and shedding accompanied by bleeding. This periodic vaginal discharge or uterine bleeding is called menstruation.

Question 2

Generally there are no special symptoms, but sometimes there may be general discomfort, fatigue, breast tenderness, swelling of hands and feet, soreness and heaviness in the lower abdomen and back, etc. There may also be constipation, diarrhea (prostaglandin effect), frequent urination and poor appetite. Some patients experience symptoms such as headache, insomnia, palpitations, depression or irritability, which usually disappear naturally after menstruation.

One of the physiological characteristics of the female reproductive system is its cyclical changes, and menstruation is an important sign of this cyclical change. The menstrual cycle is mainly regulated by the interaction between the hypothalamus, pituitary gland and ovary. The hypothalamus regulates the function of the pituitary gland, and the pituitary gland regulates the function of the ovary.

The endometrium undergoes cyclical changes under the action of ovarian hormones. The sex hormones produced by the ovaries, in turn, act on the hypothalamus and pituitary gland, affecting the release of gonadotropin-releasing hormone, follicle-stimulating hormone and luteinizing hormone, which is the so-called feedback effect; when their release is inhibited, it is called negative feedback, and when their release is promoted, it is called positive feedback.