4 doctors weighed in:
A cold sore just sprouted on my lip and i'm monogamous, does that mean my girlfriend of 4 years gave it to me by cheating?
4 doctors weighed in

3 doctors agree
In brief: No
The virus that causes cold sores is acquired by contact, but once you have it it's yours for life.
Most people pick it up as children from older relatives.

In brief: No
The virus that causes cold sores is acquired by contact, but once you have it it's yours for life.
Most people pick it up as children from older relatives.
Dr. Kitturah Schomberg-Klaiss
Dr. Kitturah Schomberg-Klaiss
Thank
Get help from a real doctor now
Dr. Cindy Juster
Board Certified, Pediatrics
32 years in practice
2M people helped
Continue
107,000 doctors available
Read more answers from doctors