What should I do if I develop a cold sore at the corner of my mouth?

Herpes simplex is primarily caused by infection with the herpes simplex virus (HSV) and commonly occurs at the junctions of skin and mucous membranes—especially affecting the lips, eyes, and oral mucosa—and tends to recur frequently. If outbreaks occur frequently, medical evaluation of immune function is recommended to assess for conditions such as anemia or leukopenia. So, what should you do if you develop herpes lesions at the corner of your mouth?

What to Do If You Develop Herpes at the Corner of Your Mouth

The primary cause of herpes at the corner of the mouth is HSV infection. Treatment typically involves topical application of gentian violet solution or neomycin compound ointment, combined with oral antiviral agents such as Wu Wei Xiao Du Yin oral liquid and valacyclovir hydrochloride tablets. If secondary bacterial infection occurs during treatment—manifesting as lesion rupture and purulent discharge—additional therapies such as erythropoietin may be considered.

Herpes lesions at the corner of the mouth are often attributable to viral infection; recurrent occurrences may indicate compromised immunity. For instance, elderly individuals and young children are more susceptible due to naturally lower immune function; in such cases, latent HSV infection may reactivate when immunity declines.

       Management of oral herpes can involve pharmacologic treatment alongside dietary modifications. During treatment, keep the affected area dry and clean. Consuming foods rich in vitamin C—such as oranges and apples—may support wound healing. We hope this information proves helpful.