A little pain in the stomach at 36 weeks of twin pregnancy may be caused by compression of surrounding tissues, false contractions, premature labor and other factors. 1. Peripheral tissue compression: the uterus will gradually increase in size after 36 weeks of twin pregnancy, which will compress the surrounding tissues and organs, and the symptom of stomach pain may occur. 2. False contractions: Pregnant women who remain in one position for a long time, external stimulation, mental tension, etc., may lead to irregular contractions and may have symptoms of abdominal pain. 3. Preterm labor: in the case of preterm labor at 36 weeks of twin pregnancy, uterine contractions may occur, from irregular contractions to regular contractions, with symptoms of abdominal cramps. The suggestion is to go to the hospital to find out the cause of the problem and then carry out the relevant treatment.