Aphthous ulcers. Than for few days.

I am very sensitive to oral nsaids. Even if I take one pill of ibuprofen along with ranitidine, still on the same day itself I get burning stomach pains from gastritis. Now my question is whether I can use choline salicylate + lignocaine gel for my recurrent aphthous ulcers or not. Even choline salicylate is a type of nsaid. And I am worried if it can harm me the same way like oral nsaid. I would like to know that whether I can use it for long period of time or not.as I am frequent sufferer of mouth ulcers since childhood. I have tried bcomplex also but whenever I am stressed or eat anything spicy, I get these ulcers in mouth. I want to keep a go to medicine for long term use which can be used to help me eat food with mouth sores.till date I have been using benzocaine but now would like to know about zytee L (choline salicylate+ lignocaine) Also. so my concern is for recurrent and long term use rather than for few days.