When you are two months pregnant with a swollen belly, you need to exclude whether there are factors such as cold and exertion. If these factors can be ruled out, some pregnant women can have soreness and discomfort in the lower abdomen and lumbosacral region in the early stage of pregnancy, and a small number of people will have hidden pain or paroxysmal pain in the lower abdomen. After pregnancy, the uterus will grow along with the growth of the embryo, there will be a small number of people can feel the lower abdomen, such as swelling pain or soreness and discomfort. If the pelvic wall ultrasound examination shows that the size of the embryo is normal, and the blood HCG value is synchronized with the development of the embryo, in this case, the soreness or pain in the abdomen does not need special treatment.