I think you should be more concerned with your Grave’s disease. Numbness could be a sign of poor control. If you are havaving medications for Grave’s disease or have been treated for it, you should ask your doctor for the most recent thyroid blood tests or request for one. It is true that numbness can be caused by heart disease and it is familial; but hypocalcemia (low blood calcium levels) and other electrolyte abnormalities can also cause numbness. I do hope this helps and take care always.
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