Thyroid Cancer / Nodules & Hyperthyroidism Expert Forum
Fingernails indicative of thyroid problems?
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Questions in the Thyroid forum are answered by Mark Lupo, MD. Topics covered include Goiter, Graves Disease, Hyperthyroid, Parathyroid/Calcium Problems, Thyroid Cancer, Thyroid Nodules/Cysts, Thyroiditis, Thyroid & Pregnancy, Thyroid Stimulating Hormone (TSH), Thyroid Tests, and Thyroid Surgery.

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Fingernails indicative of thyroid problems?

I have been on Synthroid and Thyroid (Armour) for hypothyroidism for two years.  I have very weak, thin, finger nails that break or split horizontally and/or vertically, moons only on my thumb and 1st fingers, multiple thin ridges going up and down on my nail beds & a few fingernails that are flat or bend under.
I also have mitral valve prolapse with regurgitation - grade 3. Are my fingernails indicative of either my thyroid or heart problem?
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Nail changes may be thyroid -- it takes months for them to improve even with normal thyroid levels -- which I hope has been achieved on Synthroid/Armour.

Nailbed problems may also be other chronic disease -- in the case of heart valve problems there is something called "splinter hemorrhage" which is dark spots in the nailbed from endocarditis (infection of the valve) -- usually these patients are quite sick and have a fever.

Consider, in addition to a multivitamin, a vitamin formulation specifically for hair/nails/skin.
3 Comments
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Avatar_f_tn
I had the very same issues with my nails when my thyroid was out of wack especially hyper.
What was your last lab results?
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Avatar_n_tn
Haven't had my levels check in over a year, but considering some other symptom I have, I suspect my thyroid is hyper.
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A related discussion, fingernails was started.
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Mark Lupo, M.D.Blank
Thyroid & Endocrine Center of Florida
Sarasota, FL
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