Complications of nasal endoscopic surgery include bleeding, ocular complications, intracranial complications, adhesions in the operative cavity, and sinus orifice atresia. Since the sinuses are adjacent to the orbit, anterior cranial fossa, anterior and posterior sieve arteries, and internal carotid arteries, they are susceptible to injury in the presence of anatomical variations or if the surgeon’s anatomy is unfamiliar. Ocular complications include intraorbital hematoma, nasolacrimal duct injury, intraocular muscle injury, optic nerve injury, etc. Intracranial complications include cerebrospinal fluid rhinorrhea, intracranial hematoma, intracranial infection, and brain parenchyma injury. Surgical cavity adhesions and sinus atresia are due to inadequate perioperative treatment and care, while severe sinusitis and nasal polyps are due to severe intraoperative mucosal injury and incomplete sinus opening. Therefore, in order to effectively avoid intraoperative and postoperative complications, it is necessary for both doctors and patients to work closely together. Nasal endoscopy surgeons need to carry out standardized training, mainly including anatomical training, training in surgical operation techniques and training in therapeutic concepts, and the patient’s requirements are to strictly comply with the preoperative and postoperative follow-up and continuous treatment requirements to ensure that the mucous membrane of the operative cavity is successfully epithelialized.