When my daughter was 2 she had a bad case of Oral thrush. She had previously had Oral thrush when she was an infant and this was treated using Nilstat. This particular case I caught it off her and it was quite intense for me and took a while to treat it got to the point where I could not eat or talk or even swallow. Ever since then (she is 3 months of turning 5) random reddish circular spots appear on her tongue in different places, different sizes from time to time...If I was to estimate a timeline between when I notice it I'd say every 2-4 months.. Is it an underlying issue from Oral Thrush or are they an issue like ulcers? Why is it always recurring? Could this be a symptom of an immune disorder?