Cold sores are the result of a herpes simplex virus (HSV) infection, and can spread through kissing or sharing drinks, towels, lip balm, and more. The infection can remain latent until common triggers, which include the common cold, flu, extreme weather, hormonal changes, and more.
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Resources
Why Do I Get Cold Sores? Common Triggers Explained. Cleveland Clinic. November 10, 2023.
