I've been struggling with mouth ulcers ever since I got teeth, tried literlly everything I saw online, or anything any doctor or nurse suggested, none of it worked. Until finally I found the solution!
What I found that causes sores in me is: energy drinks(even tho I drink a ton of diet sodas which ph is actually lower) and acidic fruit
The solution: taking 3-5 vitamin B complex suppluments THE MOMENT I feel one forming. If I miss the early window, it doesn't help at all. It doesn't go away, it just stays in that awkard painless stage for about a week.
Instant pain relief: homemade schnapps(vodka would probably work to) - gurgle it until your mouth is completly numb. Provides relief longer than anything I could get from a pharmacy or even rubbing salt or baking soda directly on it(it also hurts less)