If the tumor is not treated and allowed to develop, the progress will be faster and the survival time may be shorter, for example, around one or two years. Of course, there is also a situation that cannot be treated when bowel cancer is clearly diagnosed, such as advanced bowel cancer, where the patient is in very late stage, in very poor condition, with very poor nutritional status, abdominal pain and bloating, as well as severe malnutrition, malignancy, electrolyte disorders, etc., so it is not possible to do standardized treatment, such as treatment with targeted drugs or chemotherapy drugs, radiotherapy, etc., and generally requires nutritional support. The main treatment method is conservative medical treatment such as nutritional support. If patients are not treated, especially without nutritional support, they may suffer from malnutrition, cachexia, and even electrolyte disorders over time.