Hi. I'm a young adult and I am living with my girlfriend. I have been getting Canker Sores all my life. I have noticed on multiple occasions that when I make out with her day after day, the canker sores tend to pop up more. I was wondering if this is actually a way that canker sores can be caused, or if it is something else.
I usually get like 1 or 2 at most at a time, but currently, I have 2 right next to each other (which has never happened) and one on my other lip. I know Canker sores aren't contagious (plus my girlfriend has never even had one before) but i was wondering if the making out was still a possible cause of it.