Definition
Hemorrhoids are swollen tissues that contain veins and that are located in the wall of the rectum and anus. They may become inflamed, develop a thrombus (blood clot), bleed, or become enlarged and protrude. If they stay inside the anus they are called internal hemorrhoids. Those that protrude outside the anus are called external hemorrhoids. 1st stage- small hemorrhoids which do not go protrude to...
source https://health-info.org/common-disease/hemorrhoids/
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