I am not: sure what a spot on the lip refers to, but cold sore is usually a blister that opens up leaving a shallow ulcer on the lip. It is caused by Herpes Simplex usually type 1
Answered 11/9/2014
3.6k views
3 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question