Soft Tissue Laser Surgery is different from Hard Tissue Laser Surgery (bones and teeth in dentistry) and Laser Eye Surgery (eye sight corrective surgeries) by particular types of lasers. Lasers differ from each other by the wavelength of light they produce. The most commonly used surgical laser in soft tissue surgery is the CO2 laser. The CO2 laser wavelength (10.6 micrometers) is highly absorbed by water contained in soft tissue. Because of its outstanding versatility and precision, the CO2 surgical laser is the most efficient and dominant soft tissue surgical laser since the 1960s. Laser surgery is widely practiced in many applications of human as well as veterinary medicine.

The carbon dioxide laser is a very effective tool for treating diseases of the perianal region. The skin of the perianal region is thin and sensitive. The carbon dioxide laser offers a ‘no touch’ method of excising these lesions, which helps decrease postoperative discomfort and irritation. The carbon dioxide laser is very effective in controlling hemorrhage from vessels smaller than 0.5 mm. This is sufficient in controlling most hemorrhage caused from the rich blood supply of the perianal region. The perianal region is contaminated with bacteria. The carbon dioxide laser photothermally vaporizes bacteria, so that bacterial numbers are decreased.