(HealthDay News) -- A cold sore is a painful sore that often forms on the lips or around the mouth. While a cold sore is caused by the herpes virus, many factors can act as triggers.
The American Academy of Dermatology says potential triggers include:
Cooler Noses May Be Key to Winter's Spike in Colds
FDA Panel to Again Weigh Merit of Decongestant That Many Call Useless
Is Your Kid's Runny Nose Going on Forever? Here's What You Need to Know
Having Kids Around Might Shield You From Severe COVID: Study