The feeling of anal swelling after pregnancy is divided into two cases: one is a physiological manifestation and the other is a pathological manifestation. Physiological manifestations are due to the growth of the fetus after pregnancy and the enlargement of the uterus, which will compress the pelvic cavity. Due to the rich blood flow around the pelvic cavity and the expansion of blood vessels, it will show the feeling of anal cramping, which is relatively common. Pathological manifestations are due to inflammatory infections in the pelvis, endometritis, pelvic inflammatory disease, hemorrhoids and other diseases, which can lead to a feeling of anal swelling.