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Hello, I have been hypothyroid for over 20 years. Years ago I started to notice a problem with my left thumb which would keep splitting vertically.
Over the years it has spread to about 5 of my fingers at different times. I have to keep nails shorter than I would like like but they still split. Just be chance the other day I read online that vertical splitting is caused by under active thyroid. Anyone have this same problem and have you found a solution. Thanks.
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