How is herpes viral oral ulcer caused?

Oct 25, 2022 Source: Cainiu Health
Disease description:

The mouth ulcers suddenly spread and merged into larger areas, with some parts oozing fluid. There's also a mild fever at night—could this be caused by a viral infection? How does herpes virus lead to oral ulcers?

Doctor's answer (1)
Dr. Zhang Lei
Herpetic oral ulcers are caused by infection with herpes simplex virus type 1. Infection with herpes simplex virus type 1 occurs without distinct seasonality and commonly affects the tongue, lips, labial mucosa, and adjacent perioral skin. Active treatment involves taking antiviral medications. Herpetic oral ulcers are contagious; patients are advised not to share eating utensils with family members until fully recovered to reduce the risk of transmission.