Pregnant women who are more than 4 months pregnant and have symptoms of stomach pain are physiological pains related to abnormal pregnancy process, or may be pathological pains caused by diseases or pathological pains related to pregnancy. The specific analysis has: 1. If the performance of vague pain in the lower abdomen, and the duration is very short, 1-2 times a day occasionally, mostly considered to be the abdominal pain symptoms caused by irregular uterine contractions, may be related to the pregnant woman overwork, emotional excitement, improper diet and other factors, no major problems, after rest can disappear. 2. If the abdominal pain symptoms last longer, the degree of pain is not very serious If the pain is not relieved after rest, it may be caused by pregnancy-associated ovarian cysts, pregnancy-associated fibroids and other diseases, so you need to go to the hospital for ultrasound examination to further clarify the diagnosis.