when it comes to mouth cold sores, is it the same virus that causes sores inside the mouth (cheeks gums tongue etc) as the one that causes on the outside of the mouth (lips edge)? Why do some people present with exterior sores vs interior sores, and if you already experience interior sores but not exterior, are you likely to experience exterior lip sores if you are in contact/saliva exchange with someone who is symptomatic with exterior lip sores?

Thanks!

Age: 35
Male
Medications: N/A
General Information: no