The late-stage symptoms of rectal cancer patients in clinical practice mainly include the following types. The first type is abdominal symptoms caused locally by rectal cancer. For example: bloody stools, pass stools with mucous and pus, anal pain, bloating, abdominal pain, and other manifestations. The second category of symptoms is those from metastases in various locations. For example, bone metastases cause bone pain and limb movement disorders. Lung metastases cause chest tightness, shortness of breath after activity, chest pain, breathing difficulties, coughing and coughing up blood, etc. Brain metastases cause headaches, dizziness, and seizures. The third category of symptoms is mainly systemic symptoms caused by rectal cancer lesions, such as: weight loss, fatigue, and high fever.