Home Anal fistula Piles Anal fissure About us Feedback Contact us Overview Causes Disease process Symptoms Diagnosis Grading Treatment Prevention Myths Patient  Haemorrhoids(Piles)... Q What is Photocoagulation?    A device called a photo coagulator focuses infrared light into a fine point at the end of a probe, which spot welds the hemorrhoid in place. This is used for hemorrhoids that are actively bleeding.