What does an external hemorrhoid look like?
External hemorrhoids are hypertrophic protrusions of the skin around the anal margin, forming skin tags, or expansions of the subcutaneous venous plexus, where blood flow stagnates and thromboses form, or other raised lesion-like abnormalities appear. Based on histopathological characteristics, external hemorrhoids can be categorized into four main types: connective tissue-type, thrombotic-type, varicose-type, and inflammatory external hemorrhoids. Connective tissue-type external hemorrhoids primarily consist of hypertrophic protrusions of the anal margin skin tags, also known as skin tag external hemorrhoids. Varicose-type external hemorrhoids, also known as venous cluster-type external hemorrhoids, occur when the venous plexus below the dentate line expands and twists, forming venous clusters. Inflammatory external hemorrhoids are a condition where pre-existing skin tag external hemorrhoids develop inflammatory changes. Thrombotic-type external hemorrhoids are a type of anal disease that occurs due to bleeding from the hemorrhoidal veins or the formation of thromboses in the skin around the anus.
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