Rectal cancer is easily confused with hemorrhoids in the early stage, so it is important to distinguish them. First of all, hemorrhoid itself does not cause difficulty in defecation, especially the thinning of stool, even if the nucleus of hemorrhoid is prolapsed and embedded, it only manifests as short-term reluctance to force to relieve stool due to painful defecation; once the edema and inflammation subsides, it immediately returns to normal; on the contrary, patients with rectal cancer have difficulty in defecation, thinning of stool, accompanied by abdominal distension, paroxysmal abdominal pain, and sometimes can feel intestinal sounds, and the symptoms usually do not relieve by themselves, and are often The symptoms usually do not resolve on their own and often worsen progressively. Both rectal cancer and hemorrhoid can have blood in stool, but the former blood and stool are often mixed together and bleed more, while hemorrhoid bleeding is usually before or after stool, with less bleeding and fresh blood attached to the surface of stool. The lump of rectal cancer patients will not shrink but only grow gradually, and its shape is cauliflower-like, light red, and easy to bleed when touched, while the lump of hemorrhoid edema is often smooth, dark red or dark purple, and not easy to bleed when touched. Finally, rectal cancer in late stage sometimes shows corresponding symptoms because the tumor invades the surrounding tissues, such as invasion of bladder may cause painful urination and frequent urination, invasion of presacral nerve may cause severe and continuous pain, metastasis to liver may cause hepatomegaly, jaundice, and anemia, etc.