Erythromycin ointment is not recommended to be applied inside the ear, if it really needs to be applied it is recommended to be applied by a professional doctor, it is better for patients not to apply it by themselves. Erythromycin ointment is an antibacterial topical ointment that can inhibit or kill mostly gram-positive bacteria, and some gram-negative bacteria for the treatment of purulent inflammatory infections of the auricle, as well as local abrasions, injuries, etc., have a certain therapeutic effect. The reason why erythromycin ointment is not recommended to be applied inside the ear is because erythromycin ointment is a very sticky substance and once it is applied inside the ear, it can easily cause the ointment to block the ear canal inside the ear, leading to hearing loss, stuffiness, tinnitus and other discomfort for the patient. Once this ointment is inside, it is not easy to clean it out, and over time it can easily induce cerumen blockage in the ear canal, inducing ear canal discomfort and other discomfort.