Hi there , i posted recently about severe sciatica which is no better, now for last week I have had mouth ulcers , the worse ones just inside my lips . I don’t know the cause , maybe because im feeling low or maybe because my white cell count is very low . I have been using anbesol liquid and rinsing with salt water. Has anyone any ideas re the cause or any suggestions for treatment . My mouth has also been extra dry if that’s a factor?