Sacral pain is not necessarily bowel cancer, but when bowel cancer invades the presacral nerve or bone metastasis, it may cause sacral pain. Sacral pain is mostly caused by overwork, sciatica, sacral trauma, etc. It is often due to compression of sacral nerve root, resulting in sacral pain and obstacles such as urination and defecation. Sacral pain may be simply caused by aseptic inflammation of local tissues, or caused by other diseases of anus and intestines, and is not necessarily a manifestation of bowel cancer. When bowel cancer invades presacral nerve or bone metastasis, it may cause sacral pain symptoms. Early stage of bowel cancer mostly manifests as abdominal pain, abdominal mass, blood in stool and change of bowel habit. When patients have symptoms of sacral pain, they need to pay attention to rest more, do not do strenuous exercise, and go to the hospital in time to determine the cause of the disease and then carry out standardized treatment.