Anal examinations are as follows: 1) Anal visual examination, to see whether the anal skin is normal in shape, whether there is any subcutaneous bruising, whether there is any breakage, whether there is any abnormal secretion at the anal opening; 2) anal finger diagnosis, the doctor wears gloves, applies lubricant to the index finger and plugs it into the anus to feel clockwise for a week to see whether there is any hard swelling growing in the anus, whether there is any anal sphincter spasm, etc.; 3) anal The anoscope is a barrel-shaped mirror, which is also lubricated on the head and inserted into the anus, and then the plug in the middle of the anoscope is withdrawn to observe whether there are hemorrhoids growing in the anus, whether there are swellings or whether the mucosa is congested through the mirror tube; 4. The intersection of the large and small intestine.