Erythromycin ointment, which can be applied to the nose, it can be applied to the surface of the nasal septum, the surface of the inferior turbinate, and the surface of the nasal vestibule can be used. It can play the role of anti-inflammatory, soften the nasal cavity, lubricate the nasal cavity, moisturize the nasal mucosa, improve the internal environment of the nasal cavity, avoid local infection of the nasal cavity, etc. It can also prevent nasal bleeding. However, when applying erythromycin ointment clinically, if patients feel that the concentration is too large, they can use erythromycin eye ointment instead, because this drug also belongs to prescription drugs, and it is best to apply it under the guidance of an ENT outpatient doctor. The following points should be noted when applying: 1. If the patient has allergy to erythromycin drugs, this is not to be used, if used instead will increase the discomfort of the nasal cavity; 2. The dosage should not be too large, the dosage is too large, may block the nasal cavity, resulting in discomfort of the nasal mucosa; 3. The time of using the drug should not be too long, because erythromycin also belongs to the antibiotic class of drugs, the time is too long, there is a risk of forming local di The infection. When using it, we should pay attention to observe whether the patient is uncomfortable, if uncomfortable, it is recommended to stop using it immediately and then go to the hospital for review.