If you are pregnant, you should be alert to the possibility of pre-eclampsia and ectopic pregnancy, and you should consult a hospital as soon as possible to check the blood HCG (human chorionic gonadotropin) and vaginal ultrasound. 1, the patient has been clearly intrauterine early pregnancy, at this time the stomach a burst of pain, does not exclude the possibility of pre-eclampsia abortion, if the re-examination of blood HCG level than the previous growth is not satisfactory, early pregnancy ultrasound indicates that the intrauterine fetal sac is normal or detection of intrauterine liquid dark area can be diagnosed, feasible fetal preservation treatment; if the paroxysmal abdominal pain aggravated, vaginal bleeding, cervical opening can be seen flesh-like tissue outflow, the development of inevitable abortion, such as bleeding more need to perform urgent clearance to stop bleeding;; If the increase of blood HCG is satisfactory, the ultrasound of early pregnancy is not abnormal, and the abdominal pain is relieved after resting without further aggravation, consider the possibility of physiological abdominal pain, which is a normal physiological phenomenon in early pregnancy, and may be induced by the early embryonic implantation, the pulling of uterine ligament, and the accelerated metabolism in the body due to the change of hormone level in the body. Pay attention to maintenance, prevent cold, eat less sour and spicy food, local hot compresses, can be effectively adjusted. 2.If there is no clear intrauterine early pregnancy (such as HCG positive, vaginal ultrasound can not see the intrauterine fetal sac, the doctor suggested to review after a week; or self pregnancy test stick to detect pregnancy), a burst of stomach pain, need to highly suspect the possibility of ectopic pregnancy, such as tubal pregnancy, need to urgently go to the hospital to review the above two indicators, such as HCG value increases, ultrasound can see a tubal mass, no fetal sac in the uterus, consider Ectopic pregnancy needs to be treated conservatively or surgically in hospital; abdominal pain in ectopic pregnancy is often manifested as prolonged episodes in one side of the lower abdomen, with gradual and intense pain and even fainting. In addition to the above-mentioned factors related to pregnancy, we should also pay attention to complications during pregnancy, such as acute appendicitis, acute gastroenteritis, acute pancreatitis, acute kidney and ureteral stones, etc.