The pain similar to menstruation in the lower abdomen at 36 weeks of pregnancy is caused by contractions in late pregnancy, which is a normal physiological phenomenon and need not be overly worried. If a pregnant woman experiences contractions during the second trimester due to exertion and stress, she can rest in the left lateral position to relieve the pain, and should pay attention to resting, avoiding overwork and relaxing. If the contraction pain is caused by cold, you can put a warm water bag on the abdomen to reduce the pain by warming the abdomen, and avoid catching cold, try not to touch the cold water. If the pregnant woman’s abdominal pain is more serious and accompanied by regular contractions, it is likely to be a symptom of impending labor, and she should go to the hospital for ultrasound in time to clarify the condition of the fetus in the uterus and prepare for delivery. Pregnant women during pregnancy should pay attention to do a good job of prenatal checkups, actively listen to the advice of professional doctors to do a good job of comprehensive care and health care, pay attention to more rest, at the same time, should relax, to avoid nervousness, anxiety, there is any discomfort should be timely to the hospital, by the doctor to clarify the diagnosis, and cooperate with the doctor to deal with the symptoms.