1, Hemorrhoids may occur in people of any age, while patients with rectal cancer are mostly middle-aged or elderly. 2. Patients with hemorrhoids have blood in their stool, which is due to the grazing of the affected area during defecation. Blood mostly drips down with the discharge of stool, so it does not mix with feces, much less the presence of mucus. In contrast, the stool of rectal cancer patients is often mixed with blood, mucus and thick liquid, and the stool habit will change significantly. The frequency of stools increases, and there is also a feeling of urgency and heaviness. If the diarrhea cannot be alleviated even after medication, you should pay special attention to it. 3, the finger into the anus to check is one of the most effective methods. Because most of the hemorrhoids and rectal cancer occur in the area that can be reached by the finger. If you reach into the anus with your finger and feel some small raised grains inside, you have hemorrhoids. If you feel a cauliflower lump in the intestine or an ulcer with a raised edge and a sunken center, and find that the intestinal cavity is so narrow that only one finger can fit; after examination, blood, thick fluid and mucus are on the finger sleeve, you are most likely to have rectal cancer and should go to the hospital as soon as possible to avoid missing the opportunity for treatment.