In the sixth month of pregnancy, if your stomach has a slight tingling or swelling sensation, this is normal. This is because the fetus in the process of growth will lead to a slight break in muscle fibers, the belly will also appear to have stretch marks, this situation belongs to the physiological performance. During this period, try to pay attention to rest and not to overexert yourself. If you experience stomach pain and a feeling of tightness and hardness during pregnancy, it is considered that there is a possibility of pre-eclampsia, so you should pay attention to rest and observation. If the condition does not recover after rest, and if the condition worsens, you should go to the hospital for a timely checkup to determine the signs of miscarriage, and use birth control medication in time to prevent miscarriage.