[Pre-operative health education] 1. Rinse your mouth with mouthwash after each meal to clean the oral mucosa. 2.Pay attention to keep warm and prevent cold. 3.The nurse will cut the nasal hair on the operation side for you, please do your personal hygiene: haircut, shave, shower, cut finger (toe) nails. 4.Change clean gown in the morning of surgery, take off valuables, dentures, hairpin, watch, contact lenses, etc. and hand them over to your family for safekeeping. 5. Fasting and water fasting for 6 hours before surgery for general anesthesia. Post-operative health education】 1. 6 hours after surgery, lie flat, and after 6 hours, semi-recumbent position is allowed. 2.Light activity on the first day after surgery, and then gradually increase the amount of exercise. 3.Keep your mouth clean and wash your mouth with mouthwash after each meal. 4.From the first day after surgery, enter liquid (such as milk, juice, rice soup, etc.), later change to semi-liquid diet according to the condition, (such as: thin rice, noodles, cakes, etc.). Food to avoid too hot fruit, prohibit smoking, alcohol, avoid spicy, stimulating food. Nutritious and easily digestible food is recommended, with small and frequent meals. After the incision is healed and the posterior nostril gauze ball is removed, it can be changed to normal diet. 5, when eating note to prevent the mouth wire bite off. 6.For dry mouth and lips, lip balm can be applied. Underarm temperature measurement. 7.It is still necessary to master the three methods of inhibiting sneezing and coughing: finger pressure on the human middle; tongue tip on the palate; deep breathing. 8.Intranasal drops of paraffin oil on the first postoperative day, and change to compound peppermint oil or furosemide nasal drops after the gauze is drawn. 9.Keep the bowels open, and inform the medical staff if there is constipation. Do not use excessive force to defecate in order to prevent bleeding from the incision. Discharge health guidance] 1. Avoid strenuous exercise. 2.Prevent colds, exercise, increase nutrition, and enhance physical fitness. 3. Use nasal drops as prescribed by the doctor. 4.Regular outpatient follow-up. 5.Cultivate good hygiene habits, do not dig your nose with your fingers. If you find a large amount of nasal bleeding, you should seek medical attention in time. I hope that through the above introduction, you can have a preliminary understanding of nasal lateral dissection surgery and prevention and treatment of nasal bleeding, and enhance your knowledge of this surgery to cooperate with the treatment and care to achieve the expected results as soon as possible.