The abdominal pain of pregnant women in 20 weeks of pregnancy may be physiological pain, pre-eclampsia, disease symptoms, etc., according to the different symptoms to distinguish the following aspects: 1, physiological pain: may be due to the enlargement of the uterus, pulling the uterine ligament, which is a physiological phenomenon, usually need to pay attention to dietary regimen, meals to light, easy to digest as the principle; 2, pre-eclampsia: pre-eclampsia, in addition to abdominal pain, may also appear vaginal bleeding. It may also appear vaginal bleeding, so timely examination is necessary to determine. If the abortion is pre-eclampsia, it is best to carry out fetal preservation treatment, bed rest, sexual intercourse is strictly prohibited, oral medication or infusion treatment can be taken, and medication needs to be used according to the condition; 3, other diseases: pelvic inflammatory disease, urinary tract infection and other diseases may cause abdominal pain, accompanied by increased discharge, painful urination and other symptoms, if the abdominal pain is obvious, it is recommended to seek medical treatment in a timely manner. Abdominal pain found during pregnancy should promptly seek medical attention to determine the cause and take certain measures if necessary. You can eat more food with high protein and vitamin content, such as soy products, eggs, lean meat and fresh fruits and vegetables, to ensure nutrition during pregnancy. Pay attention to consume less oily, spicy and stimulating and cold foods, such as crab and apricot.