Carpal tunnel syndrome is one of the most common medical causes of numb hands. It occurs when the median nerve in the wrist becomes compressed, often due to inflammation or repetitive hand movements.
Common symptoms include:
Tingling in the thumb, index, and middle fingers
Weak grip strength
Nighttime numbness
Pain radiating up the arm
People who type, use tools, or perform repetitive wrist motions are at higher risk.
3. Nerve Compression in the Neck or Arm
Sometimes the issue doesn’t originate in the hand itself. A pinched nerve in the neck or spine can cause numbness that travels down the arm into the hand.
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Possible causes include:
Herniated discs
Cervical radiculopathy
Ulnar nerve compression
These conditions interfere with nerve signals from the spinal cord to the hands.
4. Vitamin Deficiencies
A lack of certain nutrients—especially vitamin B12—can damage nerves and lead to tingling or numbness in the hands and feet.
Other nutrients linked to nerve health include:
Vitamin B6
