Deep ridges in nails

Hi Everyone: I was wondering if any of you experience deep verticle ridges in your fingernails? I have read that this can also be hypothyroid but my levels are normal. Anyone have this show up as a symptom of Lyme Disease? Thanks.  D

I have had some deep ridges & some not so deep, in my fingernails & toe nails for as long as I can remember!! I had to check out my nails, now that I've read this & discovered that those ridges are not as deep as they used to be. Not sure what this all means.

Is it just your TSH testing OK? Or have you had your T3 and T4 tested, too? "Normal" TSH is such a wide range as to be meaningless for some people. I have tested normal for years, and it was only after I insisted that they test the T3 and T4 that the hypothyroidism showed up.

I've heard that ridges in your nails is a sign of iodine deficiency. Related to hypothyroidism, but not the same thing. Most Americans are low, especially in the Great Lakes regions.