The symptoms of anal cancer are mainly as follows: 1. Blood in stool: Patients may have pus-like stool or mucus-like stool during defecation, or sometimes fresh blood stool. 2. Mass: If it is anal cancer or rectal cancer, a hard mass with poor mobility, uneven surface and cauliflower-like can be touched during anal finger diagnosis. In case of colon cancer, hard masses with poor mobility and mild pressure pain may be felt in the abdomen. 3. Change in bowel habits: If the patient is suffering from colon cancer, the main manifestation is abnormal bowel habits, such as diarrhea for a period of time and constipation after a period of time, and some patients may also show symptoms such as progressive wasting and anemia. Therefore, when there is obvious discomfort, it is necessary to go to hospital as soon as possible to clarify the cause of the disease in order to prevent delay.