Aunt here refers to menstruation. There are individual differences in how painful menstruation can be, and most women can tolerate it, while some patients have severe pain and need prompt treatment. When menstruation comes, the prostaglandin content of the female endometrium rises, which can cause contraction of the female uterine smooth muscle, vascular spasm, thus causing pain in the lower abdomen on the pubic bone, lumbago and other discomforts, 12 hours before the onset of menstruation and the day of the heavier, and then can be relieved, and the majority of women can tolerate it. Some women suffer from underlying diseases such as adenomyosis and endometriosis, which make menstrual cramps severe and unbearable at the onset of menstruation, affecting their daily life, and in serious cases, leading to infertility, and requiring timely treatment. Patients should seek medical treatment as soon as possible when abnormalities occur to avoid delays and adverse consequences.