What are some triggers for cold sore outbreaks?

    Researchedby:
    Kamal Patel
    Last Updated: December 3, 2024

    Known triggers include stress, surgery, hormonal changes, menstruation, fever, UV radiation (including sun exposure), dental treatment, and some medications, e.g., corticosteroids.[1] However, cold sore recurrences (outbreaks) can also happen with no trigger.[2]