The risks of sinus surgery include but are not limited to scarring, bleeding, infection, injury to the eye, injury to the brain with leakage of cerebrospinal fluid, and the risk of general anesthesia. The risk of scarring is greatly reduced by frequent nasal cleaning and irrigation after surgery. The risks of injury to the eye and injury to the brain are extremely low- less than 0.5% in experienced hands – and have become even less encountered with the use of image guidance.