I was wondering...do your sinus
and ear infections (and mouth ulcers) happen on the same side? If so, are they pretty painful and antibiotics don't seem to help? If this is the case, you may have a subtle case of shingles, or a recurrent fungal infection. I know, weirdness, but Dr.s don't always look for these things...Also, hypo can mess up your body chemistry, causing it to be more susceptible to infection...