Signs of recurrence and metastasis of rectal cancer include change of stool trait and habit, abdominal mass, systemic symptoms and so on. 1. Change of stool character and habit: if the patient recently has blood or mucus in stool, feeling of falling in anus before defecation, feeling of urgency and heaviness (discomfort in lower abdomen, wanting to defecate very much, feeling of incomplete defecation after defecation), then the patient needs to be highly alert to whether it is recurrence of rectal cancer or not. 2. Abdominal mass: when the patient has abdominal mass, abdominal pain, abdominal distension, hyperactive bowel sounds, etc., it means that the tumor invades the intestinal lumen, leading to incomplete intestinal obstruction. 3. Systemic symptoms: if the patient has anemia, emaciation, weight loss, low fever, low resistance, etc., the patient may have systemic symptoms due to recurrence and metastasis of cancer, and should go to the hospital in time to clarify the cause of disease. After the poor treatment of recurrence and metastasis of rectal cancer, it is suggested that patients should strengthen postoperative management and regular follow-up examination to reduce the adverse effects of the disease through “early detection, early diagnosis and early treatment”. If patients have the above symptoms, please go to the hospital in time.