Why Do I Get a Painful Fever Blister on My Lip Every Time I Get a Cold?
1. Introduction The predictable appearance of a painful fever blister, also known as a cold sore, precisely when an individual develops a respiratory cold is a classic demonstration of viral latency and immune system dynamics. This localized lesion is caused by the reactivation of the Herpes Simplex Virus Type 1. When a person catches a … Read more