Can erythromycin ointment be used for cold sores at the corners of the mouth?
Disease description:
Today, upon waking up, I noticed a small blister near the corner of my mouth, which is quite painful. I’m considering applying erythromycin ointment for treatment—would that be appropriate? Can erythromycin ointment be used for blisters at the corner of the mouth?
Doctor's answer (1)
Dr. Zhang Liwen
The appropriate course of action must be determined based on the patient’s specific condition. If the blistering at the corner of the mouth is caused by “excess internal heat” (a traditional Chinese medicine concept), erythromycin ointment may be used prophylactically. Additionally, if oral blisters rupture, erythromycin ointment can help prevent wound infection. However, if the perioral blisters are caused by herpes simplex virus infection, erythromycin ointment will not be particularly effective. Therefore, patients presenting with lip blisters are advised to seek timely medical evaluation at a hospital to determine the underlying cause and receive targeted treatment. Self-medication should be avoided, as it may impede recovery.
