I think the toe pain is most likely to be uric acid crystals dissolving. So, increasing allopurinol dose to hasten that process is a very good idea. If you want me to explain why you get pains where you never got them before, please ask.
I’m sorry, I can’t comment on the iron blood test. I don’t understand the blood chemistry of iron enough. And, I can’t find anything to make me think it would be allopurinol related. But, I’m always happy to learn, if anyone has relevant information.
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