What should I do if a cold sore on the lip bursts?

Herpes is usually caused by infection with the herpes virus. If oral herpes ruptures, it is recommended to use medications such as calamine lotion, penciclovir cream, recombinant human interferon alpha-2b gel, ganciclovir cream, or mupirocin ointment under medical guidance to improve symptoms.

1. Calamine Lotion

Applying calamine lotion can help astringe and protect the skin, thereby relieving discomfort symptoms.

2. Penciclovir Cream

Penciclovir cream is an antiviral medication that helps eliminate the herpes virus in the body, control symptoms, and promote recovery.

3. Recombinant Human Interferon Alpha-2b Gel

When used according to medical advice, interferon gel can enhance T-cell phagocytic activity and boost the function of other immune cells, limiting the spread of herpes lesions and helping reduce pain and itching.

4. Ganciclovir Cream

Since herpes is typically caused by herpes virus infection, ganciclovir ointment—being an antiviral agent—can help inhibit viral replication and control uncomfortable symptoms.

5. Mupirocin Ointment

If bacterial infection occurs after the herpes lesion breaks open, mupirocin ointment may be used to suppress bacterial growth and reproduction, control inflammatory infection, and promote healing.

Diet for ruptured oral herpes should be light. Spicy and irritating foods should be avoided to prevent further irritation to the lesion and interference with wound healing. If medication proves ineffective, seek hospital care and receive standardized treatment under a doctor's supervision.