Nasal sprays are commonly used clinically to treat nasal diseases, mainly including nasal spray hormones, nasal spray antihistamines and nasal spray decongestants, the correct method of use can make the maximum effect of drugs and reduce side effects. Specific methods: 1, first clean the nasal cavity, you can use saline nasal rinse, blow out the nose; 2, check the nasal spray, shake the drug well, you can first spray a spray into the air, if you see a uniform aerosol drug spray, it can be used normally; 3, keep your head upright, use the opposite side of the spray bottle (left hand holding the bottle to spray the right nasal cavity, right hand holding the bottle to spray the left nasal cavity), the nozzle towards the outer corner of the eye 4.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 lateral wall of the nasal cavity to prevent the drug from being sprayed on the nasal septum and causing discomfort; 5. Use a tissue to wipe the nozzle for cleaning after spraying. Caution: 1, if the drug from the posterior nostril into the oropharynx is recommended to spit out, if necessary, gargle; 2, according to the instructions or follow medical advice to determine the time and dose of spray; 3, do not use the tip of the needle to poke the nozzle, will damage the nozzle to affect the dose; 4, press the resistance and no aerosol spray or spray for the liquid are indicative of the nozzle does not work properly; 5, for special patients, such as nasopharyngeal adenoid hypertrophy, spray drug 5, for special patients, such as nasopharyngeal adenoid hypertrophy, when spraying drugs to pay special attention to the slightly posterior nasal position of the drug; 6, when spraying drugs pay attention to the pressure, too much pressure will cause choking.