Is it the same virus that causes sores inside and outside the mouth?

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

I have been experiencing sores in my mouth and lips for 10 years now?

I have been experiencing sores in my mouth and lips for 10 years now. I have gone to different hospitals for test, like: Hiv,CBC,Blood sugar,Syphilis,biopsy but the doctors couldn’t get the cause of it. Please what else should I do or what other test can u suggest? Am tired of it, help please

FIND THE BEST DOCTORS NEAR YOU

Cardiologists – Cosmetic Surgeons – Dermatologists – Ear, Nose and Throat Specialists – Gastroenterologists – Gynecologists/Obstetricians – Neurologists – Oncologists – Orthopedic surgeons – Pediatricians – Psychiatrists – Pulmonologists – Urologists