Sinus rinsing after nasal endoscopy can effectively remove dry crusts, increase local blood circulation, promote the clearing function of cilia, reduce edema, and be more conducive to adequate ventilation of the nasal cavity and sinuses and discharge of secretions, thus greatly shortening the postoperative treatment time. Doctors also found in their work that patients who insist on cleaning the nasal cavity also have satisfactory recovery results. Here again: nasal cleaning is generally started 6-7 days after surgery, 2-3 times a day, and rinsing for one to three months. So how do patients clean their nasal cavity? This is the correct way to operate the nasal cleanser that we will introduce below. A. Nasal cleaning solution Currently, hospitals provide professional nasal cleaning solution to prevent patients from mastering poor concentration when preparing their own. The cleaning solution is a warm saline rinse nasal cavity in line with the human saline concentration (0.9%) and human body temperature (35-37℃), just like tears in the eyes, without discomfort, which can reduce the occurrence of choking. Second, the nasal cavity cleaning 1, cleaning bottle nose plug port tilted up, the bottle vertical, nose plug port in the “0” closed position (nose plug port at the 3 gears. 0: closed; 1: smaller water; 2: larger water), rinse a cleaning solution used about 260ml (i.e. 1 bottle). 2, pull out the cleaning bottle on the cover cover plug, one hand holding the bottle recess, and use your index finger to plug the upper cover air intake hole. (Step ① + ②) 3, the other one will nasal plug port according to the direction of the arrow rotate to 1 or 2. head to be located above the lavatory pool, should be low head forward 30 °, the nozzle should be close to the nostrils, slightly adjust the angle of the nozzle, try to avoid rinsing fluid along the nostrils vertical upward. 4.Open your mouth and breathe slowly and calmly with your mouth. Block the nasal plug port tightly to the nostril to be rinsed, plug the upper lid air hole with your index finger, hold the bottle hand while squeezing the bottle to start rinsing the nasal cavity, the cleaning fluid that flows into the nasal cavity from one side of the nostril, rinse the nasal cavity, and then flow out from the other side of the nostril or mouth. (Step ③) 5, to enter the nasal cavity of the strength of the water flow becomes weak, the index finger leaves the upper lid intake hole for air, hold the bottle body of the hand relaxed, the bottle relies on elasticity to return to its original position, and then repeat the above steps to continue to clean. (Step ④) 6, after rinsing, the cleaning bottle nose plug port rotate to “0” (closed position), the upper lid cover plug back to the upper lid air inlet hole. 7.When rinsing again, screw down the upper cap and pour about 260ml of salt solution in the refill bottle into the cleaning bottle for use. Caution 1. Do not over-pressure or swallow or speak during flushing to avoid choking and coughing and squeezing of sewage into the eustachian tube causing middle ear infection; 2. Patients should not rinse; 4. After rinsing, patients should lie down for several minutes and use the compound liquid paraffin nasal drops to nourish the nasal mucosa, reduce nasal odor and promote the recovery of nasal mucosa function; 5. After nasal rinsing, rinse the nasal rinse with water and hang it to air-dry for backup.