External hemorrhoids are palpable around the anus and are classified as connective tissue external hemorrhoids, varicose external hemorrhoids, inflammatory external hemorrhoids and thrombotic external hemorrhoids. The most common type of external hemorrhoid is the skin around the anal verge, which needs to be distinguished from the normal anal skin folds, which have a few obvious protrusions, while the normal anal skin folds are mostly evenly distributed. Varicose external hemorrhoids are sponge-like and are characterized by variable size, becoming larger when squatting during defecation and smaller afterwards. Inflammatory external hemorrhoids are edematous connective tissue external hemorrhoids that look like blisters that can be felt around the anus as well. Thrombosed external hemorrhoids are also circulatory disorders, which are severe circulatory disorders that cause blood vessels to rupture and blood to pool under the skin at the anal verge, looking like a purple swollen bag, and most of them can absorb and relieve themselves in the early stages of severe pain, or require surgery if they are too extensive.