The correct use of rhinitis sprays includes preparation before use, specific use, and treatment after use. 1. Preparation before use: first of all, the nasal cavity should be cleaned, saline can be used for nasal rinsing, blowing out the nose. Check the rhinitis spray, shake the drug, you can first spray into the air, if you see a uniform aerosol spray out of the drug, it means that it can be used normally. 2. Specific use: use the nozzle towards the corner of the eye in the direction and upward tilt about 45 degrees, inhale through the nose before spraying, hold your breath when spraying, and exhale through the mouth after spraying to prevent the drug from being inhaled into the lower respiratory tract. Ensure that the drug mainly acts on the outer wall of the nasal cavity to prevent the drug from spraying on the nasal septum, which may cause discomfort. 3. Post-use treatment: Use tissue paper to wipe the nozzle for cleaning after spraying. If the drug flows into the oropharynx during use, it is recommended to spit it out and rinse the mouth if necessary. Determine the spraying time and dosage according to the instructions or medical advice. Avoid artificially enlarging the nozzle to avoid affecting the dose. When pressing the nozzle, there is great resistance and no aerosol spray or liquid spray suggests that the nozzle is not working properly and needs to be replaced. If the medication is not effective, consult a doctor.