Bowel cancer usually develops to advanced stage in 2-3 years. When bowel cancer first occurs, some patients do not have any symptom, while some patients may have vague pain or swelling pain in the abdomen, and some may show more frequent stools or thinning stools, or even have bleeding on the surface of stools or blood in stools. In general, the size of intestinal tumor will increase significantly in six months to a year, and it may occupy half or one circle of the intestinal canal. If the patient does not have timely treatment, the tumor will metastasize along the lymph nodes or metastasize along the blood, and once it metastasizes to the patient’s liver or metastasizes to the patient’s lung, it usually indicates advanced stage intestinal cancer. So the overall time may be more than one year, and for most patients it may be about two or three years.