My partner suffered for years with sinus issues and infections. He recently went to see my naturopath and they discovered he had a severe zinc deficiency.
Might be worth seeing a naturopath and seeing what they can offer you.
I had it really bad in UK and had two operations, over here in drier climate never had it as bad - but I take horseradish vinegar daily and I think that also helps. Any type of horseradish works well but I think the vinegar is best, will look up brand for you.
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