Hemorrhoids are typically diagnosed by physical examination. A visual examination of the anus and surrounding area may diagnose external or prolapsed haemorrhoids. Visual confirmation of internal hemorrhoids require Anoscopy, a hollow tube device with a light attached at one end. There are two types of haemorrhoids: external and internal. These are differentiated by their position with respect to the dentate line. A rectal exam may be performed to detect possible rectal tumors & polyps.
Internal haemorrhoids are those that originate above the dentate line. They are covered by columnar epithelium which lacks pain receptors, that the reason that they are painless. They were classified into four grades based on the degree of prolapse.
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