Possible symptoms of anastomosis inflammation after rectal cancer surgery include fever, abdominal pain, blood in stool, intestinal obstruction and so on. 1. Fever: Inflammation of anastomosis after rectal cancer surgery often leads to secondary infection, thus there are fever symptoms, and high fever suggests that the infection is more serious. 2. Abdominal pain: postoperative anastomotic inflammation of rectal cancer often has abdominal pain, which is often located in the anastomosis area and has pressure pain when pressed. 3. When anastomosis is inflamed after rectal cancer surgery, local intestinal mucosa is congested and edematous, permeability increases, and local intestinal bleeding can occur and cause bloody stool manifestation. 4. Intestinal obstruction: when anastomosis is inflamed after rectal cancer surgery, local intestinal congestion and edema may cause anastomotic obstruction and a series of intestinal obstruction manifestations, such as stopping defecation, abdominal distension, abdominal pain, local abdominal muscle tension and so on. For patients who suspect anastomotic inflammation after rectal cancer surgery, it is recommended to communicate with the treating doctor as soon as possible, monitor the condition closely and treat the condition in time to avoid aggravation of the condition and affecting the postoperative recovery.