Iodine and a stiff neck.

Hey everyone,

I'm completely new to Iodine supplementation.
Anyway, I was told to take some Povidone-iodine 10% (named Betadine) and after taking a few drops I didn't really feel much UNTIL that night I felt a bit sweaty and the next morning, my neck was extremely stiff and remained that way the next two days. Always worse in the morning.

Anyone know what would cause that reaction?

Thanks!

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