1, internal hemorrhoids: Stage I: no obvious conscious symptoms, mainly blood, no hemorrhoid nucleus prolapse phenomenon. Stage II: When defecating, the hemorrhoid nucleus prolapses out of the anus, which can be restored by itself after defecation, and there is often a feeling of swelling in the anus. Stage III: The hemorrhoids prolapse during defecation and cannot be returned on their own. 2. External hemorrhoids: (1) Thrombosed external hemorrhoids. (2) Connective tissue external hemorrhoids. (3) varicose veins external hemorrhoids. (4) Inflammatory external hemorrhoids. 3.Mixed hemorrhoids are located on the dentate line and below, formed by the traffic between the upper and lower rectal varices, covered by rectal mucosa above and anal canal skin below.