Hi, how are you? For years now, I have
been confused by cold sores and canker
sores. My understanding it that canker
sores occur only inside the mouth and are
not contagious, while cold sores occur
only outside the mouth and are contagious.
I have heard that cold sores come from
herpes and other sexually transmitted
diseases, but am not sure if this is
true.
When a person has blisters outside their
mouth (usually on the lip or on the areas
below their lips), what is it called?
I'm not talking about diseases, but just
common blisters. Are these called cold
sores? Thank you in advance.
