3 years with ulcers going from 1-2 to 40-50 at once is definitely not normal and needs proper workup, not just repeated local treatment.. recurring ulcers like this at such scale usually point to something systemic rather than just a local mouth issue, so treating only the ulcers each time will keep giving you temporary relief without solving the actual cause
Next Steps
please get a full blood workup done - cbc,
vitamin b12, iron studies, folate, and zinc levels
Health Tips
please avoid using steroid gels/medicines repeatedly on your own without doctor supervision, as long term use can cause side effects