Finger Numbness

Overview

Finger numbness is a loss or reduction of normal feeling in one or more fingers, so that touch, temperature, or pain are harder to sense. It is often accompanied by tingling, a "pins and needles" feeling, or a sense that the finger has "gone to sleep." Most finger numbness comes from a nerve being squeezed or irritated somewhere between the neck and the fingertip.

Which fingers are affected is a valuable clue. The median nerve serves the thumb side of the hand, the ulnar nerve serves the little finger side, and nerves from the neck supply specific areas. Brief numbness after pressure on the hand or arm is common and harmless, but numbness that is persistent, spreading, or comes with weakness deserves attention.

Paying attention to exactly which fingers go numb, when it happens, and what relieves it gives a clinician valuable clues, since each nerve supplies a particular area. A short record of episodes, along with any neck, elbow, or wrist symptoms, often helps pinpoint where along the nerve's path the problem lies.

Common Causes

Finger numbness usually reflects pressure on or damage to a nerve. Common causes include:

• Carpal tunnel syndrome: Median nerve compression at the wrist, numbing the thumb, index, middle, and half the ring finger. See carpal tunnel syndrome.
• Ulnar nerve compression: Pressure at the elbow or wrist that numbs the little and ring fingers. See cubital tunnel syndrome.
• Pinched nerve in the neck: A compressed cervical nerve root sending numbness into specific fingers.
• Raynaud phenomenon: Cold-triggered narrowing of finger blood vessels causing numb, pale fingers.
• Peripheral neuropathy: Nerve damage, often from diabetes, affecting the fingers of both hands.
• Temporary pressure or injury: Leaning on the hand or a finger injury.

Associated Symptoms

The symptoms accompanying finger numbness help point to the cause:

• Tingling or burning in the same fingers
• Weakness, clumsiness, or a tendency to drop small objects
• Pain in the wrist, elbow, neck, or shoulder
• Color changes, with fingers turning white or blue, suggesting circulation problems
• Symptoms triggered by certain positions, cold, or time of day

Finger numbness that appears suddenly with face drooping, slurred speech, confusion, or weakness on one side of the body can signal a stroke and is a medical emergency.

Whether the numbness affects one hand or both, and whether it is triggered by cold, also helps. Cold-triggered numbness with color change in the fingers points toward a circulation cause, numbness in both hands suggests a body-wide nerve problem, and numbness in one hand in a specific finger pattern points to a single compressed nerve.

Diagnosis & Evaluation

A clinician will ask which fingers are involved, when the numbness occurs, and what makes it better or worse. Evaluation may include:

• A physical exam testing sensation, strength, and reflexes in the hand and arm
• Maneuvers such as tapping over the wrist or bending the elbow to reproduce symptoms
• Nerve conduction studies and EMG: Tests that locate where a nerve is compressed
• Blood tests for diabetes, thyroid problems, or vitamin deficiencies
• Imaging of the neck, elbow, or wrist when a structural cause is suspected

Treatment & Management

Treatment depends on the cause, and many people improve with simple steps:

• Position changes: Avoiding sustained postures that pinch a nerve, such as bent wrists or leaning on the elbow.
• Splints: A wrist splint for carpal tunnel or an elbow pad for ulnar nerve pressure, often worn at night.
• Ergonomics and activity changes: Adjusting workstations, tools, and repetitive tasks.
• Keeping warm: For numbness driven by cold-related circulation changes.
• Treating underlying conditions: Managing diabetes, thyroid disease, or deficiencies.
• Injections or surgery: A corticosteroid injection or a nerve-release procedure for severe or persistent compression.

When to See a Doctor

See a doctor if finger numbness is persistent, keeps returning, or comes with weakness, pain, or clumsiness that affects daily tasks. Call emergency services immediately if numbness comes on suddenly with any of the following, which can indicate a stroke:

• Drooping on one side of the face
• Slurred speech or trouble understanding speech
• Weakness or numbness on one whole side of the body
• Sudden confusion, severe headache, or loss of balance

Also seek prompt care after a significant injury to the neck, arm, or hand, or if a finger turns cold, white, or blue and does not recover.

Related Topics

Frequently Asked Questions

References

1. National Institute of Neurological Disorders and Stroke (NINDS). Peripheral Neuropathy.
2. American Academy of Orthopaedic Surgeons (OrthoInfo). Hand and wrist conditions.
3. Mayo Clinic. Numbness — Symptoms and causes.
4. MedlinePlus, U.S. National Library of Medicine. Numbness and tingling.