In general, anal digital diagnosis can be divided into two parts: external digital diagnosis and internal digital diagnosis. Patients with rectal cancer can feel that the surface of the mass is uneven, with pus and necrotic tissue. In general, the significance of anal digital diagnosis is that you can directly touch the lower rectum and anal canal for tumors, tenderness and tenderness to diagnose benign and malignant tumors, infections and anal fissure, and then you can touch the sphincter through anal digital diagnosis to understand the tension of the sphincter and judge some diseases, and then you can find rectal and colon lesions early according to whether there is blood on your fingers. In addition, you can also have a preliminary look at hemorrhoids and anal fissure. Under normal circumstances, if the test is positive, it mainly means that there is mucus and pus on the condom, and some diseases are suspected.