Where do internal hemorrhoids originate?

Internal hemorrhoids originate above the anorectal line, which is located at the upper margin of the anal canal. These hemorrhoids develop from the plexus of veins situated in the submucosal layer of the rectum. This positioning means they are located within the rectal interior, which is important in understanding their clinical presentation and management.

When internal hemorrhoids become engorged with blood, they can protrude into the anal canal, but they remain above the identifiable anorectal line. This anatomical distinction is crucial in differentiating internal hemorrhoids from external hemorrhoids, which form below this line and are thus associated with different symptoms and treatment approaches. Understanding this classification helps healthcare professionals accurately diagnose and treat hemorrhoidal conditions.