Nasal polyps are benign space-occupying lesions that occur in the nasal cavity and sinus cavities. There are several aspects to the examination of nasal polyps: Firstly, an anterior rhinoscopy examination can be performed. If the nasal polyps are large, or even protruding outside the nasal cavity, they can be directly seen. Anterior rhinoscopy enlarges the nasal cavity, allowing visualization of the middle nasal meatus and other tissues inside the nasal cavity. Secondly, a nasal endoscopy can be utilized. Nasal endoscopy is particularly effective for viewing polyps located deeper within, or at the back of the nasal passages, providing very clear visibility. Other examinations, such as electronic rhinoendoscopy, follow the same procedure. The third examination involves a sinus CT scan, which is helpful for identifying the origin of the nasal polyps, as well as the location, range, and extent of obstruction caused by the polyps. Another examination is the pathological examination after nasal polyp surgery, which aids in determining the origin and risk associated with the nasal polyps, as well as assisting in subsequent treatments.