Laser surgery is a procedure that uses a light beam to treat injured tissue by heating the affected cells, for which different types of lasers are used. For anal surgery often it uses carbon dioxide (CO2). Anal pathologies that may be treated by laser include haemorrhoids, anal fissure and fistula where it has failed to respond to treatment with ointment, soothing or a suitable diet. This technique is very precise; it only acts on the affected area without damaging the surrounding area and takes just a few minutes. Thus, the laser replaces conventional surgery which caused a painful postoperative patient.