After rectal cancer excision surgery, there is much fluid accumulation, which can be treated by the following methods: puncture and drainage, albumin infusion and diuresis, etc. 1. After rectal cancer resection surgery, due to traumatic injury and other reasons, there will be more exudation, which will lead to fluid accumulation. If there is more fluid accumulation, puncture and drainage can be performed under local anesthesia; or implanting drainage tube locally, which will have better effect of drainage and can eliminate fluid accumulation. 2. Transfusion of albumin and diuretic: if the albumin is low, the fluid in the blood vessels will leak out, which may lead to a large amount of effusion, at this time, you can transfuse albumin, and you can also assist diuretic treatment, which can make the effusion gradually absorbed and reduced. It is recommended to improve the relevant examination, such as ultrasound, etc., to determine the severity of the disease, and then can be treated accordingly.