The reason for the pain in the belly at the beginning of pregnancy is more, it may be due to physiological factors, but it may also be due to high-risk obstetric diseases such as pre-eclampsia, for different situations, different treatment measures need to be taken. 1, physiological factors: because the fertilized egg began to grow and develop after bedding, the uterus will gradually expand, although the size of the embryo is small, but the small changes in the uterus may also cause discomfort symptoms of pregnant women. Pregnant women may feel small abdominal pain, if squeezed to the bladder, there will be frequent urination, urinary urgency, this is normal, pregnant women do not need to worry too much, feel uncomfortable when you can rest in bed, regular maternity checks can be; 2, pathological factors: some pregnant women in early pregnancy small stomach pain, may be due to pre-miscarriage, at this time the pregnant women can be accompanied by vaginal bleeding symptoms, abdominal pain is located in the lower abdomen, and The pain can be accompanied by vaginal bleeding, abdominal pain is located in the middle of the lower abdomen, and gradually worsens. The former can be treated by progesterone injection or oral progesterone preparation, while the latter can be treated by oral small dose of thyroid tablets. The former can be treated with progesterone or progesterone preparations, while the latter can be treated with small doses of thyroid tablets. Some pregnant women who suffer from gynecological diseases such as pelvic inflammatory disease and vaginitis may also experience early pregnancy pain in the abdomen, so they need to seek early medical attention for targeted treatment to avoid affecting pregnancy.