Internal hemorrhoids are located above the dentate line in the anal canal, at the end of the rectum, and are innervated by the autonomic nervous system. Clinically, they are mainly characterized by intermittent, painless rectal bleeding. The blood is bright red, often dripping or spraying after defecation. If internal hemorrhoids worsen, they can prolapse and even become strangulated and edematous, causing anal swelling and pain. External hemorrhoids, on the other hand, are located below the dentate line in the anal canal, and are innervated by the spinal nerves, making them more sensitive to pain. Clinically, they are categorized into skin tag-type external hemorrhoids, varicose vein-type external hemorrhoids, inflammatory external hemorrhoids, and thrombotic external hemorrhoids. Skin tag-type and varicose vein-type external hemorrhoids primarily cause a sensation of a foreign body and itching in the anus, while inflammatory or thrombotic external hemorrhoids can lead to an increase in perianal secretions and anal swelling and pain, necessitating prompt surgical removal of the external hemorrhoids.