In recent years, postoperative ache has been remarkably mitigated by establishment of operation methods using carbon dioxide laser surgical units.  In our clinic, the carbon dioxide laser was introduced in 1982 and it is now applied for almost 100% of operations for hemorrhoid, anal prolapse, anal fissures, and anal fistulas.  Incisions can be made by laser, with irradiation to the affected part while stopping bleeding.  The temperature of the affected part raises to about 1500 degrees for only an instant, and hemorrhoids can thereby be extirpated.  There is generally little or no blood loss, so operation time can be shortened.

Moreover, although the carbon dioxide laser acts by heating, its greatest feature is the lack of major influence on normal functions.  Therefore, there is little anal dropsy after surgery and aching is minimal.  Moreover, as compared with the conventional methods, recovery of cracks is rapid.