'Piles' is characterized by the swelling and inflammation of the rectal and anal veins that cause discomfort and bleeding. It usually affects the lower part of the rectum and the anus. On the other hand, an anal fistula refers to an infected tunnel or channel between the anal canal (internal opening) and the skin near the anus (external opening). It is more common in the people with a history of an anal abscess. An anal fistula is formed when the anal abscess drains out but does not heal in a proper way. Both of these conditions can be completely treated with the help of laser technology. The following quiz provides an overview of the laser treatment for piles and anal fistula.