The anal hardness, do not be nervous, perform anal visualization, rectal diagnosis, if necessary, can perform perianal ultrasound and other auxiliary tests to clarify the diagnosis. There are several common reasons for hard anus, 1. If the anal gland infection spreads along the anal canal to the perianal area, it will show as a hard mass at the anal opening, which is painful when touched, and usually perianal ultrasound can make a clear diagnosis. 2. If necessary, biopsy can be performed to obtain histopathology for clear diagnosis. Therefore, there are many reasons for the hard texture of the anus, so you can perform colonoscopy or perianal ultrasound and other auxiliary examinations to clarify the diagnosis.