Erythromycin ointment can be applied inside the nose, generally in the following cases are available: 1, the patient’s sudden nasal cavity dryness, tear-like pain. This situation occurs in allergic rhinitis or acute rhinitis, when you can use a cotton swab dipped in erythromycin ointment to apply inside the nasal cavity.2. Another situation is atrophic rhinitis when accompanied by infection, when you can also use erythromycin ointment and apply it to the nasal cavity.3. Another situation is the mucous membrane recovery period after surgery, you can also apply erythromycin ointment to help the mucous membrane to recover, but For long-term dry rhinitis, atrophic rhinitis, without infection, it is advisable to use nasal saline or seawater nasal spray, as well as each hospital’s homemade menthol ointment to apply, not long-term erythromycin ointment to apply to the nasal cavity.