Hemorroids - Internal
Hemorrhoids (US English) or haemorrhoids, are vascular structures in the anal canal which help with stool control. They become pathological or piles when swollen or inflamed. In their physiological state they act as a cushion composed of arterio-venous channels and connective tissue that aid the passage of stool. The symptoms of pathological hemorrhoids depend on the type present. Internal hemorrhoids usually present with painless rectal bleeding while external hemorrhoids present with pain in the area of the anus.
Recommended treatment consists of increasing fiber intake, oral fluids to maintain hydration, NSAID analgesics, sitz baths, and rest. Surgery is reserved for those who fail to improve following these measures.
Internal hemorrhoids are inside the anus and thus not visible on direct visualization. The diagnosis is usually made with by digital (finger) palpation in side the anus.
Internal hemorrhoids are those that occur above the dentate line. Specifically, they are varicosities of veins draining the territory of branches of the superior rectal arteries. As this area lacks pain receptors, internal hemorrhoids are usually not painful and most people are not aware that they have them until they have bleeding. Internal hemorrhoids bleed when irritated.