Infrared Coagulation(also called coagulation therapy) is a medical procedure used to treat small- and medium-sized hemorrhoids. This treatment is only for internal hemorrhoids. During the procedure, the doctor uses a device that creates an intense beam of infrared light. Heat created by the infrared light causes scar tissue, which cuts off the blood supply to the hemorrhoid. The hemorrhoid dies, and a scar forms on the wall of the anal canal. The scar tissue holds nearby veins in place so they don't bulge into the anal canal.
Only one hemorrhoid can be treated at a time. Other hemorrhoids may be treated at 10- to 14-day intervals. This medical procedure may be done with other devices, such as a laser or electrical current, that also cut off a hemorrhoid's blood supply. Infrared photocoagulation is done in a doctor's office. You may feel heat and some pain during the procedure. Afterward, you may have a sensation of fullness in the lower abdomen. Or you may feel as if you need to have a bowel movement.
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