Simple external hemorrhoids do not necessarily require surgery. External hemorrhoids are mainly those that grow below the dentate line, and their main clinical manifestation is a foreign body sensation in the anus, which does not pose a significant risk to the body. Only thrombosed external hemorrhoids with obvious anal pain may not require surgery if the lump is small, as the thrombus can be absorbed on its own. Only those with large lumps need to have the thrombus removed to alleviate pain.