I get these VERY often. I seem to get them only after eating something that can damage the mucosa in my mouth such as hard chips (Tostitos, very jagged very pain). These are NOT cold sores (HSV). This is simply a aphthous ulcer; they can be stress induced (studying for hard test). they are very painful and do reoccur. there are no associated sx with them.
Wyh is it shhatuop ursecl fi eethr are on GI spymo?stm Wyh tnac’ ti eb ephesr r?zoste