Blood in stool one year after radiotherapy for cervical cancer may be due to radioactive proctitis caused by radiotherapy, or it may also be due to the metastasis of cancer cells to the digestive tract, or the occurrence of hemorrhoids, rectal polyps and other diseases in patients. 1. Radioactive proctitis: blood in stool after one year of radiotherapy may be caused by long-term radiotherapy affecting the digestive system and radioactive proctitis, which may lead to the symptom of blood in stool. 2. Cancer cell metastasis: if the effect of radiotherapy is not good, the condition gradually aggravates, and the cancer cells have metastasized to the digestive tract, it may also lead to blood in stool, and the patient should go to the hospital for pathological examination in time to make it clear. 3. Digestive tract diseases: it is not excluded that cervical cancer patients also suffer from hemorrhoids, rectal polyps, colitis, rectal cancer and other diseases, which cause blood in stool, and they can go to the hospital for anal diagnosis and enteroscopy to make it clear. It is suggested that patients should seek medical treatment in time, clarify the cause with the help of doctors and actively carry out treatment.