An anal fissure is a small tear in the lining of the anal canal, often caused by passing hard stool, chronic constipation, or repeated straining. It triggers a cycle of pain and muscle spasm that can make the tear difficult to heal on its own. Laser Anal Fissure Treatment uses Lasotronix laser technology to relax the internal sphincter muscle and promote healing of the fissure, breaking the pain-spasm cycle without the cutting involved in traditional sphincterotomy — resulting in less discomfort and a faster, more comfortable recovery.