Possibly, an upper: Respiratory infection could be a trigger for a cold sore. Triggers for cold sores can include illness, stress, fatigue, becoming physically cold, dry air, uv rays (sun), mouth trauma or one's period.
Answered 10/4/2016
4.7k views
A doctor has provided 1 answer
A doctor has provided 1 answer
3 doctors weighed in across 3 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question