Numbness and tingling

Your doctor may also ask you questions to assess your risk for stroke, an underactive thyroid, or diabetes, as well as questions about your work habits and medications.

Diagnostic tests that may be performed include:

• Blood tests such as CBC, electrolytes, thyroid function tests, and vitamin B-12 levels
• Imaging studies like a CT scan of the head, CT scan of the spine, MRI of the head, or MRI of the spine
• Electromyography to measure how your muscles respond to nerve stimulation
• X-ray of the affected area
• Lumbar puncture to assess for multiple sclerosis and other conditions
• Ultrasound of neck vessels to evaluate your risk for TIA or stroke

Viera AJ. Management of carpal tunnel syndrome. Am Fam Physician. 2003; 68(2): 265-272.

Smeal WL, Tyburski M, Alleva J, Prather H, Hunt D. Conservative management of low back pain, part I. Discogenic/radicular pain. Dis Mon. 2004; 50(12): 636-669.

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