Most of the post-pregnancy stomach pain like pins and needles is caused by physiological reasons, some are also pathological reasons, it is recommended to go to the hospital for examination to make the correct diagnosis and treatment. A, with the increase of the uterus abdominal wall muscle fibers overstretching will cause muscle fiber damage, abdominal wall nerve stimulation caused by abdominal wall muscle pain sensation. Second, pseudo-uterine contractions, with the increase of pregnancy week the uterus will become sensitive, the slightest stimulation will produce pseudo-uterine contractions caused by pain in the stomach, pain is irregular each pain lasts a short time. As the fetus grows and matures, the organ function will be enhanced and sometimes the amplitude will be great when the fetus is moving, which will also cause stomach pain for pregnant women. Pathological pain such as placental abruption, pre-eclampsia or pregnancy complications can also cause stomach pain.