Strictly speaking, hemorrhoids are the clinical manifestations caused by varicose blood vessels around the rectum. Rectal cancer is a new localized tumor, mainly related to genetic mutations. Among the factors of rectal cancer occurrence are rectal inflammation, dietary factors, obesity factors, long-term alcohol consumption and other bad habits of life. Hemorrhoids are not the cause of rectal cancer, and hemorrhoids do not cause rectal cancer. Clinically, rectal cancer and hemorrhoids have the same clinical manifestations, mainly bleeding, which are easily confused clinically and mistakenly believe that hemorrhoids can cause rectal cancer. When there is obvious bleeding from the rectum, you should go to the hospital as soon as possible to determine whether it is caused by hemorrhoids or by rectal cancer.