It is recommended to go to the obstetrics department of the hospital in time for ultrasound, blood test and other related examinations to clarify the cause and then treat the cause. Physiological factors: the uterus gradually increases after pregnancy, resulting in the abdominal ligaments being stretched, which may cause vague pain in the stomach, this phenomenon is a physiological phenomenon, pregnant women should pay attention to rest and avoid straining. Pathological factors: 1. Pre-eclampsia: manifested as vaginal bleeding, abdominal pain or low back pain, etc. The nature of abdominal pain can be hidden. This situation should be promptly hospitalized for fetal preservation treatment. Absolute bed rest, prohibition of sexual intercourse and application of progesterone as prescribed by the doctor. 2. Ectopic pregnancy: manifested as vague pain or soreness in one side of the lower abdomen and irregular vaginal bleeding. Treatment can be surgical, medication and expectant treatment. Ovarian, abdominal and cervical pregnancies require prompt surgical treatment. For women with tubal pregnancy who have fertility requirements, conservative treatment is available. For women without fertility requirements, radical surgical treatment by removal of the fallopian tubes is available. For women with no contraindication to drug treatment, gestational sac less than 4 cm, blood HCG less than 2000 IU/L can take drug treatment, such as methotrexate; 3, chronic gastroenteritis: If pregnant women suffer from chronic gastroenteritis, they can show symptoms such as vague stomach pain, nausea, bloating, acid reflux, belching, feeling of fullness and early satiety after meals, diarrhea and constipation. It is recommended to choose dietary treatment, you can eat noodles, millet porridge and other easy-to-digest foods to relieve the symptoms. In addition, pregnant women should pay attention to control diet, avoid eating spicy, too sour, too sweet, too salty food, do not eat starch-rich food, such as sweet potatoes, taro, chestnuts, etc., quit smoking and alcohol, do not drink strong tea, coffee, three meals at regular intervals, do not eat late, regular life, do not stay up late, maintain a good state of mind and adequate sleep, if necessary, you can follow medical advice with medication; 4, ovarian cyst torsion: if a pregnant woman combined If you have an ovarian cyst, after a strenuous exercise or a change in position, you may have a sudden twisting of the ovarian cyst, at which time the patient will experience pain on one side of the lower abdomen, the degree of abdominal pain is severe and difficult to bear, accompanied by nausea, vomiting, and in severe cases, shock symptoms. In this case, the patient should go to the hospital gynecology department for emergency surgery to remove the ovarian cyst, but the surgery may cause miscarriage at the same time, so it is also necessary to actively protect the fetus symptomatic treatment; 5, uterine fibroid degeneration: pregnant women with uterine fibroid degeneration can be manifested as abdominal pain, and accompanied by nausea, vomiting, fever and other symptoms, when the examination can be found enlarged fibroids, there is pressure pain, need to go to the hospital in a timely manner. If the type of degeneration is not determined, the pregnancy should be terminated and the fibroids should be surgically removed. The surgically removed fibroids should be sent to the pathology department for examination to rule out the possibility of sarcoma.