Numbness in the Foot
Reduced or lost feeling in the foot, often with tingling
Quick Facts
- Type: Sensory (nerve) symptom
- Common causes: Pinched nerve, diabetes, poor circulation
- Often felt as: Tingling, "pins and needles," deadness
- Seek urgent care: Sudden numbness with weakness or loss of bladder control
Overview
Numbness in the foot is a loss or reduction of normal feeling, so that touch, temperature, or pain are harder to sense. It often comes with tingling, a "pins and needles" sensation, or a feeling that the foot has "gone to sleep." Most foot numbness comes from a nerve being compressed or damaged, or from reduced blood flow to the foot.
Brief numbness after sitting cross-legged or kneeling is common and resolves quickly once you move. Numbness that is persistent, spreading, affects both feet, or comes with weakness is more significant. Because reduced sensation in the feet can lead to unnoticed injuries, especially in people with diabetes, ongoing foot numbness should be taken seriously and evaluated.
Noting whether one or both feet are affected, which parts are numb, when it occurs, and what makes it better or worse gives a clinician valuable clues. Because the feet are easy to overlook, a daily glance at the skin, especially for anyone with reduced sensation, can catch small problems before they grow into bigger ones.
Common Causes
Foot numbness usually reflects a problem with the nerves serving the foot or with circulation. Common causes include:
- Peripheral neuropathy: Nerve damage, most often from diabetes, typically causing numbness in both feet that starts at the toes. See peripheral neuropathy.
- Pinched nerve in the lower back: A compressed nerve root, as in sciatica, can numb part of the foot.
- Compressed nerve in the foot or ankle: Conditions such as tarsal tunnel syndrome or Morton's neuroma.
- Poor circulation: Reduced blood flow to the legs and feet.
- Vitamin deficiencies: Low levels of B12 and other nutrients can damage nerves.
- Temporary pressure: Sitting or kneeling in one position too long.
Associated Symptoms
The symptoms accompanying foot numbness help identify the cause:
- Tingling, burning, or shooting pain in the foot or leg
- Weakness, difficulty walking, or a tendency to trip
- Back, buttock, or leg pain that radiates down to the foot
- Cold, pale, or discolored feet, suggesting circulation problems
- Skin changes, slow-healing sores, or unnoticed injuries
Numbness in both legs with weakness, loss of bladder or bowel control, or numbness in the groin area is a medical emergency that needs immediate attention.
The distribution of numbness offers clues. Numbness in a glove-and-stocking pattern affecting both feet evenly suggests a body-wide nerve problem such as diabetic neuropathy, while numbness in a specific patch or along one part of the foot points more toward a single compressed nerve in the back, leg, or foot. Sharing this detail helps direct testing.
Diagnosis & Evaluation
A clinician will ask which part of the foot is affected, whether one or both feet are involved, and what makes it better or worse. The evaluation may include:
- A physical exam testing sensation, strength, reflexes, and pulses in the feet and legs
- Nerve conduction studies and EMG: Tests of how well nerves and muscles work
- Blood tests for diabetes, thyroid problems, and vitamin deficiencies
- Imaging such as an MRI of the lower back when a pinched nerve is suspected
- Tests of blood flow if poor circulation is a concern
Treatment & Management
Treatment depends on the cause and aims to relieve the numbness and protect the foot:
- Managing underlying conditions: Good control of diabetes, treating vitamin deficiencies, and addressing circulation problems.
- Foot care: Daily inspection, proper footwear, and protecting numb feet from injury, especially in people with diabetes.
- Position and activity changes: Avoiding sustained pressure and improving posture.
- Physical therapy: Exercises to support nerve and muscle function and improve balance.
- Medication: Certain medicines can ease nerve-related pain and discomfort.
- Procedures or surgery: May be needed to release a compressed nerve in selected cases.
When to See a Doctor
See a doctor if foot numbness is persistent, affects both feet, keeps returning, or comes with weakness, pain, or trouble walking. People with diabetes should report any new foot numbness promptly. Call emergency services or seek urgent care if you have:
- Sudden numbness or weakness in the legs
- Loss of bladder or bowel control
- Numbness in the groin or inner thighs
- A non-healing wound, sore, or sign of infection on a numb foot
Frequently Asked Questions
Why does my foot keep going numb?
Repeated foot numbness often comes from a pinched nerve in the lower back or foot, nerve damage from diabetes, or reduced blood flow. Brief numbness after sitting in one position is usually harmless, but persistent numbness should be evaluated.
Can diabetes cause foot numbness?
Yes. Diabetes is a leading cause of peripheral neuropathy, which often numbs both feet starting at the toes. Because numb feet can develop unnoticed sores, people with diabetes should report new numbness and inspect their feet daily.
Is foot numbness ever an emergency?
It can be. Sudden numbness or weakness in the legs, loss of bladder or bowel control, or numbness in the groin can signal a serious nerve problem and needs immediate care. A non-healing wound on a numb foot also needs prompt attention.
What vitamin deficiency causes numb feet?
Low vitamin B12 is a well-known cause of foot numbness and tingling, and deficiencies of certain other B vitamins can also affect nerves. A blood test can check for this, and treating the deficiency may improve symptoms.
How is numb-foot caused by a pinched nerve treated?
Treatment may include physical therapy, posture and activity changes, medication for nerve pain, and addressing the source of pressure. When a compressed nerve is severe or persistent, a procedure to relieve it may be considered.
References
- National Institute of Neurological Disorders and Stroke (NINDS). Peripheral Neuropathy.
- Mayo Clinic. Numbness in feet — Symptoms and causes.
- Centers for Disease Control and Prevention (CDC). Diabetes and Your Feet.
- MedlinePlus, U.S. National Library of Medicine. Numbness and tingling.