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Hand Numbness and Coldness: Causes, Evaluation, and Treatment

Hand numbness accompanied by coldness suggests neurovascular compromise. The causes span neurological, vascular, systemic, and medication-related categories.

Neurological Causes

  • Carpal tunnel syndrome (CTS): Median nerve compression at wrist; nocturnal paresthesias, thenar wasting
  • Cervical radiculopathy (C6–C7): Neck pain radiating to arm, reflex changes
  • Ulnar neuropathy (cubital tunnel): Medial hand, ring and small fingers affected
  • Peripheral neuropathy: Diabetic (stocking-glove), B12 deficiency, alcohol, chemotherapy-induced (CIPN)
  • Thoracic outlet syndrome: Neurogenic (95%); positional symptoms

Vascular Causes

  • Raynaud phenomenon: Triphasic color change (white→blue→red) triggered by cold/stress. Primary (benign) vs. secondary (scleroderma, SLE, MCTD)
  • Peripheral artery disease: Claudication, diminished pulses, ABI <0.9
  • Subclavian/axillary thrombosis: Effort thrombosis (Paget-Schroetter syndrome)
  • Buerger's disease: Young male smokers; segmental vasculitis

Systemic and Other Causes

  • Vasovagal episodes: Transient hypotension → peripheral vasoconstriction
  • Hypothyroidism: Myxedema, carpal tunnel, cold intolerance
  • Addison's disease: Hypotension, hyperpigmentation, electrolyte abnormalities
  • Multiple sclerosis: Demyelinating plaques; Lhermitte's sign, Uhthoff's phenomenon
  • Autoimmune: SLE, rheumatoid arthritis, vasculitis
  • Medications: Beta-blockers, chemotherapy (platinums, taxanes, vincristine), antiretrovirals

Diagnostic Approach

  1. History: distribution, timing, triggers, associated symptoms
  2. Exam: Tinel's/Phale's (CTS), Froment's (ulnar), reflexes, pulses, skin changes
  3. NCS/EMG: Localize lesion, assess severity, demyelinating vs. axonal
  4. Imaging: Cervical MRI (radiculopathy), MRA (vascular), chest CT (TOS)
  5. Labs: Glucose, B12, TSH, ANA, ESR/CRP, SPEP, cryoglobulins, cold agglutinins

Management

  • Treat underlying cause (glucose control, B12 replacement, immunosuppression, revascularization)
  • CTS: Splinting, steroid injection, surgical release
  • Raynaud: Calcium channel blockers (nifedipine), PDE5 inhibitors, trigger avoidance
  • Neuropathic pain: Gabapentinoids, duloxetine, TCAs
  • PT/OT: Nerve glides, ergonomics, adaptive equipment

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