Orbital complications of functional endoscopic sinus surgery (FESS) are rare with an incidence of 0.3%. The standard clinical management of periorbital hematoma includes a complete ophthalmologic examination, consultation with an ophthalmologist, medical therapy, removal of redundant nasal packing, orbital massage, canthotomies, cantholysis, and, in severe cases, ligation of the bleeding vessels. A 58-year-old female diagnosed with chronic rhinosinusitis underwent FESS, but left periorbital ecchymosis was noted after surgery. As the symptoms worsened despite conservative therapy, the Lynch incision procedure was arranged to investigate the bleeding and decrease intraocular pressure (IOP). The primary objective in treating post-FESS periorbital hemorrhage is to decrease IOP to prevent damage to the orbital nerve. Lateral cantholysis-canthotomy is the most frequently performed surgical intervention for this purpose. However, Lynch incision was used in this case to treat post-FESS periorbital hemorrhage through decompression and ligation of the bleeding vessel. (J Taiwan Otolaryngol Head Neck Surg 2023; 58:223-226)
