I have numbness in my right arm and a cold sensation in my right leg (like growing pains). i do have an underactive thyroid for which i take eltroxin. i have had this sensation for a week now.

Neurological: Abnormal sensations of warmth, cold, tingling or numbness can indicate a problem with the neurological conduction system. It would be wise to seek a thorough evaluation to determine if there is an underlying medical problem causing this. A primary care Dr can do the initial assessment, but a Neurologist may be necessary to pinpoint the problem.