Endoscopic cyclophotocoagulation is a relatively safe cyclodestructive procedure with a lower complication rate compared to trans-scleral cyclophotocoagulation. Serous choroidal detachment is a complication that has been reported following endoscopic cyclophotocoagulation; however, it is usually mild and transient. A case of bullous choroidal detachment with a flat anterior chamber requiring drainage after endoscopic cyclophotocoagulation is presented, along with a discussion on the risk factors precipitating such complication.