Functional Endoscopic Sinus Surgery (FESS) is a minimally invasive surgical procedure used to treat chronic sinusitis and other nasal cavity disorders. During FESS, an endoscope is employed to guide small instruments in removing blockages in the sinuses that cause symptoms such as facial pain, congestion, and recurrent infections. By precisely targeting swollen or infected tissue, polyps, or bone growths within the sinus cavities, FESS helps to improve drainage and restore normal airflow. This procedure is usually performed under general anesthesia on an outpatient basis and boasts a high success rate with minimal scarring and discomfort for patients. Recovery time varies but most individuals can return to normal activities within a week. Overall, Functional Endoscopic Sinus Surgery has revolutionized the treatment of chronic sinus issues by offering a safe and effective solution for those suffering from persistent sinonasal symptoms.