Which is better for treating cold sores at the corner of the mouth: erythromycin ointment or acyclovir ointment?

If the blisters at the corner of the mouth are caused by bacterial infection, erythromycin ointment is generally used. If caused by a viral infection, acyclovir ointment is typically prescribed. It is recommended to use medications under the guidance of a physician, and if necessary, visit a hospital for treatment according to medical advice.

When blisters at the corner of the mouth are caused by bacterial infection, such as bacterial angular cheilitis, erythromycin ointment can generally be used following a physician's instructions. Erythromycin ointment belongs to the class of antibiotic medications and effectively inhibits and kills the bacteria causing the infection, helping to control inflammation and promote healing. If a patient has been medically diagnosed with a bacterial infection and has no history of antibiotic allergies, using erythromycin ointment as directed by a physician is appropriate.

Acyclovir ointment is an antiviral medication primarily used for herpes simplex or herpes zoster infections. If blisters at the corner of the mouth are caused by herpes simplex virus resulting in cold sores, applying acyclovir ointment can inhibit viral replication, thereby alleviating symptoms and promoting healing of the blisters. Hands and the lips should be kept clean during application to avoid worsening the infection.

Both erythromycin ointment and acyclovir ointment may have certain side effects, such as local irritation or allergic reactions. If any discomfort occurs during use, the medication should be discontinued immediately and medical attention sought. A light diet and maintaining skin cleanliness during treatment can aid in recovery.