Numbness in Feet

Overview

Numbness in the feet is a reduced or complete loss of normal feeling, often described as the feet being asleep, wooden, or wrapped in a thick sock. It frequently comes with tingling, prickling (pins and needles), or burning. Numbness can affect part of one foot, a whole foot, or both feet, and it may be brief or long-lasting.

Brief numbness from sitting in one position or wearing tight shoes is harmless and goes away when you move. Persistent or spreading numbness usually points to a problem with the nerves that carry sensation from the feet, the blood supply to the feet, or pressure on a nerve in the leg or spine. Because reduced feeling makes it easier to injure the feet without noticing, especially in people with diabetes, persistent numbness should be evaluated.

Common Causes

Foot numbness most often comes from nerve or circulation problems:

• Peripheral neuropathy: Damage to the small nerves of the feet, very commonly from diabetes, but also from heavy alcohol use, vitamin B12 deficiency, certain medicines, and other conditions. It usually affects both feet in a stocking pattern.
• Nerve compression: A pinched nerve in the lower back (such as from sciatica or a herniated disc) or pressure on a nerve at the ankle can cause numbness.
• Poor circulation: Narrowed leg arteries can reduce blood flow and feeling, often with cramping pain when walking.
• Temporary pressure: Sitting cross-legged or crouching compresses nerves briefly.
• Other causes: Multiple sclerosis, infections, an underactive thyroid, and exposure to cold.

Associated Symptoms

The symptoms accompanying numbness help identify the cause:

• Tingling, burning, or pins and needles
• Weakness in the foot or difficulty walking
• Pain that shoots from the back down the leg
• Cramping leg pain when walking that eases with rest (suggesting circulation problems)
• Cold, pale, or discolored feet
• Sores or wounds on the feet that you did not feel forming
• Increased thirst and urination (which may point to diabetes)

Sudden numbness on one side of the body, especially with weakness, facial droop, or trouble speaking, can signal a stroke and is an emergency.

Diagnosis & Evaluation

A clinician will ask when the numbness started, whether it affects one or both feet, and what other symptoms are present. The exam tests sensation, reflexes, strength, and the pulses in the feet. Depending on the suspected cause, tests may include:

• Blood tests for diabetes, vitamin B12, thyroid function, and other causes
• Nerve studies (nerve conduction and electromyography) to assess nerve function
• Imaging of the lower back if a pinched nerve is suspected
• Tests of blood flow in the legs if poor circulation is a concern

This helps separate a widespread nerve problem from a single pinched nerve or a circulation issue.

Treatment & Management

Treatment depends on the underlying cause:

• Control the cause: Managing blood sugar in diabetes, correcting a vitamin B12 deficiency, treating thyroid problems, and reducing alcohol can stop nerve damage from worsening and sometimes improve symptoms.
• Relieve nerve pressure: Physical therapy, posture changes, and sometimes procedures or surgery for a pinched nerve.
• Improve circulation: Treating narrowed arteries with lifestyle changes, medicines, and sometimes procedures.
• Symptom relief: Certain medicines can ease painful or burning numbness.
• Foot protection: Daily foot checks, good footwear, and prompt care of any sores are essential when feeling is reduced.

When to See a Doctor

See a doctor if foot numbness is persistent, spreading, or affecting your walking, or if you have diabetes and notice any new numbness. Seek care promptly for:

• Numbness with leg weakness or trouble walking
• Sores or wounds on numb feet
• Cold, pale, or painful feet (possible circulation problem)

Call emergency services if numbness comes on suddenly with weakness on one side of the body, facial droop, slurred speech, or after a back injury with loss of bladder or bowel control, as these can be emergencies.

Self-Care & Prevention

Protecting the nerves and the feet themselves is key, especially if you already have some numbness:

• Keep blood sugar well controlled if you have diabetes, the single most important step to prevent and slow nerve damage
• Limit alcohol, which can directly harm nerves, and eat a balanced diet with enough vitamin B12
• Inspect your feet every day for cuts, blisters, redness, or sores, since you may not feel them forming
• Wear well-fitting, protective shoes and never walk barefoot if your feet are numb
• Check bath water with your hand or a thermometer to avoid burns
• Keep moving and avoid sitting in positions that compress the legs for long periods

Treating the underlying cause early gives the best chance of stopping numbness from worsening and may allow some feeling to return.

Related Topics

Frequently Asked Questions

References

1. National Institute of Neurological Disorders and Stroke (NINDS). Peripheral Neuropathy.
2. Mayo Clinic. Numbness — Symptoms and causes.
3. MedlinePlus, U.S. National Library of Medicine. Numbness and tingling.
4. Centers for Disease Control and Prevention (CDC). Diabetes and Your Feet.