After the abortion surgery, due to the stimulation of the surgical instrument to cause uterine contraction, coupled with the pelvic congestion after the surgery, as well as lead to the pelvic cavity to appear a kind of inflammatory reaction, so after the surgery, women will have a feeling of anal swelling. This symptom usually does not last particularly long, and will be relieved in 1-2 days after the operation. If the feeling of anal distension persists after the abortion, or if it does not exist before but slowly appears later, or if the feeling of anal distension becomes more and more obvious, then it is not normal. In this case, you need to be highly vigilant, is not the occurrence of post abortion infection. If the infection is serious, it is easy to lead to the occurrence of chronic pelvic inflammatory disease and tubal blockage, it is necessary to do pelvic ultrasound and blood routine and vaginal secretion culture to clearly diagnose, once diagnosed need to actively anti-infection treatment.