The role of therapeutic endoscopy in current gastroenterology is very important. Therapeutic endoscopy is useful in the treatment of gastrointestinal bleeding. Endoscopic control of gastrointestinal bleeding includes the following procedures of hemostasis techniques: photocoagulation, electrocoagulation, thermocoagulation, and injection method. Owing to these procedures mortality has significantly decreased. Endoscopic hemostasis eliminates the risk of surgery, is less expensive, and is better tolerated by patients. Colonoscopic polypectomy is a widely used technique.