Three years after hemorrhoid surgery, the anus is very itchy may be caused by poor perianal hygiene, the anus is subject to friction, anal eczema and so on. 1. poor perianal hygiene: when the patient’s local skin environment is subject to wet or dry, after cleaning unclean, will lead to perianal skin function abnormality, perverse reaction, skin lesions, and then the patient three years after hemorrhoidal surgery anal itchy situation. 2. anal friction: three years after hemorrhoid surgery anal itchy, may be anal friction caused by the patient in the hemorrhoid surgery anal skin itself suffered a loss, there is a certain dysfunction, if there is a dry stool, it will aggravate the surface damage to the skin, stimulation is easy to form inflammation, ulcers. 3. Anal eczema: the disease may be caused by trauma, friction, moisture and heat of the local environment and other factors, resulting in patients with hemorrhoidal surgery three years after the anus is very itchy, the patient may be manifested as rough skin, hyperpigmentation, small blisters and other symptoms. It is recommended that patients go to the hospital in a timely manner, under the diagnosis of the doctor, according to the patient’s condition, to take targeted treatment, life should pay attention to personal hygiene, follow the doctor’s instructions for medication, is conducive to alleviate the symptoms.