For a few months now I've been suffering from mouth sores/blisters/ulcers whatever you want to call them. Every time I get 1 or 2. One of them will be in a real annoying place which will cause excruciating pain when I'm eating. Every day they grow by 1 mm. They last to about 2-3 weeks then they disappear, and it starts all over again the following day. I was told it is a problem with my immune system, that I should take something for it, I tried but didn't seem to help much after the first few takes. Have any of you suffered from them?