Manual anorectal examinations such as anorectal fingerprinting can be performed lying on an examination bed. At present, the common clinical anorectal examination items include anal visualization, anal palpation, etc. The common anorectal examination positions include knee-chest position, truncated position, side-lying position, etc. The specific choice of which position to choose is based on the type of disease suspected to be present. The specific choice of position needs to be based on the type of disease suspected to be possible, the purpose of the examination and other comprehensive decisions. Most of these examinations can be done lying on the examination bed in the lateral or lithotomy position. However, some tests, such as methylene blue staining to localize the opening of an anal fistula, may need to be adjusted in order to diagnose the disease more accurately. The specific choice of position, need to clinicians according to the condition of the comprehensive judgment decision, in the examination of the patient is recommended to cooperate with the physician.