Had a dental procedure done. Nothing unusual, have had them before, but the next morning after closing up a root canal I developed cold sores all over my entire mouth, top and bottom. Stinging, burning pain. It took one week to get over, and still not completely gone. Then yesterday my bridge fell out along with the root canal filling. What is going on. I go back today to get that fixed. Is it allergic reactions or due to FM always screwing around with my system? Thanks for the input and responses. Soft teddy hugs.