Should avoid everything to invoke an element, wait like traumatic, overfatigue, excited, infection, gravid, childbirth.

应避免一切激发因素，如外伤、过劳、激动、感、、分娩等。

Arrive gravid and terminal, increscent uterus and fetal show an oppressive rectum first, also can cause defecate difficulty.

到晚期，增宫和胎儿先露部压迫直肠，也都能导致排便困难。