Erythromycin is an antibiotic that treats bacterial infections or prevents bacterial infections. It has no anti-allergic effect, it has an anti-inflammatory effect. For allergies on the face, if the redness and swelling is very obvious, you can apply cold compresses. Apply it 2-3 times a day, for about 15 minutes at a time. You can also use topical creams, such as glucocorticoid creams, hydrocortisone butyrate cream, mometasone furoate cream, fluticasone propionate cream, compound flumetasone cream, clobetasol propionate cream, etc. You can also use drugs that have hormonal effects but no hormonal side effects, such as tacrolimus cream, pimecrolimus cream, etc. However, for face allergies, it is recommended that glucocorticoids should not be used for too long. In addition, you can also use traditional Chinese medicines, which have anti-allergic effects, such as dehumidification and anti-itch ointment, dampness and itching ointment, Qingpeng ointment and so on with, and you can also use Xylitol and other drugs to apply.