External connective tissue hemorrhoids are named for their morphology, also known as redundant hemorrhoids, skin prolapses and redundant external hemorrhoids. This type of external hemorrhoid is a thickened hypertrophy of the skin folds at the anal verge with connective tissue hyperplasia, no varicose veins inside the hemorrhoid, few blood vessels, wide and pointed at the base, yellowish brown or brownish black in color, prominent and easy to see, varying in size and shape. Sometimes there is only one, in the posterior or anterior middle of the anus, and sometimes several around the anus for a week. Etiology: often caused by constipation, when dry stool passes through the anus, excessive pulling of the anal skin, tearing the anal folds, causing infection and inflammation, edema, and fibrous tissue hyperplasia. After the inflammation dissipates, the crease cannot return to normal, and this repeatedly damages the crease, making it hypertrophic and becoming an external hemorrhoid. Various inflammatory diseases of the anus and rectum, such as proctitis, anal stenosis, internal hemorrhoids, anal sinusitis, anal fistula, anal fissure, etc., are also causes of external connective tissue hemorrhoids. In addition, surgery in the anus, such as hemorrhoidectomy and sinusectomy, can also affect the lymphatic and blood return in the anus due to improper skin removal, suturing, ligation, etc., and often cause external connective tissue hemorrhoids.