This is due to the growth and development of the fetus will press the rectal area, causing rectal irritation symptoms, with the growth and development of the fetus, located above the pelvic cavity, the symptoms will be reduced or disappear, during the period need to pay attention to good care, during pregnancy, need to regularly go to the hospital to do pregnancy tests, observation to see the growth and development of the fetus In the case of a more serious case of anal swelling, the symptoms will be reduced or disappear. When the anal swelling is serious, you can take the appropriate position to relieve the pressure of the fetus on the rectal area, which can reduce the irritation symptoms, or you can go to the hospital to do the relevant examination, according to the results of the examination to do symptomatic treatment, during pregnancy, you need to pay attention to strengthen nutrition, more high-quality protein and vitamin-rich food.