During the first 1-2 days of menstruation, some women may experience symptoms such as swelling, soreness, weakness and mental discomfort in the lower back and abdomen, which are similar to the physiological abdominal discomfort symptoms that occur in the early stages of pregnancy. Menstruation is the periodic shedding and bleeding of the endometrium that accompanies the cyclical changes of the ovaries. The endometrium is divided into the proliferative phase, the secretory phase and the menstrual phase under the regulation of estrogen and progesterone. The menstrual phase is what we call the days of menstruation, usually 3-5 days, and it is the final result of the withdrawal of progesterone and estrogen. Generally, there are no special symptoms at the time of menstruation, but due to the action of hormones in the body (prostaglandins) and pelvic organ congestion at the time of menstruation, some women experience discomfort of lower abdomen and lumbosacral drop or painful contraction of uterus, and may have symptoms of gastrointestinal disorders such as diarrhea, and a few patients may have headache and mild symptoms of neurological instability. Some women may experience physical abdominal discomfort caused by pregnancy in early pregnancy, which is a normal physiological phenomenon, due to early embryonic implantation, uterine ligament pulling, hormonal level changes in the body leading to accelerated metabolism in the body may induce abdominal pain. It is often manifested as a short period of time, with episodes on both sides of the lower abdomen, aggravated by exertion, and relieved after lying down and resting. At this time, we should pay attention to maintenance, prevent cold, eat less sour and spicy food, and apply local heat, which can effectively regulate. Clinically, because the symptoms of new pregnancy are not obvious and not specific, doctors mainly rely on auxiliary investigations to clarify pregnancy and the time of pregnancy: such as qualitative and quantitative determination of blood HCG, vaginal ultrasound view, etc.