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Numbness and tingling

Numbness and tingling are abnormal sensations that can occur anywhere in your body, but are often felt in your fingers, hands, feet, arms, or legs.

  • Alternative Names

    Sensory loss; Paresthesias; Tingling and numbness; Loss of sensation

  • Common Causes

    There are many possible causes:

    • Remaining in the same seated or standing position for a long time
    • Injury to a nerve -- for example, a neck injury may cause you to feel numbness anywhere along your arm or hand, while a low back injury can cause numbness or tingling down the back of your leg
    • Pressure on the spinal nerves, such as from a herniated disk
    • Pressure on peripheral nerves from enlarged blood vessels, tumors, scar tissue, or infection
    • Shingles or herpes zoster infection
    • Lack of blood supply to an area -- for example, cholesterol (plaque) build up from atherosclerosis in the legs can cause pain, numbness, and tingling while walking (this is called vascular claudication); frostbite can also reduce blood supply and lead to numbness
    • Other medical conditions, including:
    • Abnormal levels of calcium, potassium, or sodium in your body
    • A lack of vitamin B12 or other vitamin
    • Use of certain medications
    • Toxic nerve damage due to lead, alcohol, or tobacco
    • Radiation therapy
  • Home Care

    Your doctor should identify and treat the underlying cause of your numbness or tingling. Treatment of the underlying condition may reverse the symptoms or prevent them from becoming worse. For example, if you have carpal tunnel syndrome or low back pain, your doctor may recommend certain exercises.

    If you have diabetes, your doctor will discuss ways to control your blood sugars.

    Low levels of vitamins will be treated with vitamin supplements.

    Medications that cause numbness or tingling may need to be switched or adjusted. You should not change or stop taking any of your medicines or take large doses of any vitamins or supplements until you have talked with you doctor.

    Because numbness can cause a decrease in feeling, you may be more likely to accidentally injure a numb hand or foot. Take care to protect the area from cuts, bumps, bruises, burns, or other injury.

  • Call your health care provider if

    Go to a hospital or call your local emergency number (such as 911) if:

    • Weakness or paralysis occurs with numbness or tingling
    • Numbness or tingling occur just after a head, neck, or back injury
    • You cannot control the movement of an arm or a leg or you have lost bladder or bowel control
    • You are confused or have lost consciousness, even briefly
    • You have slurred speech, change in vision, difficulty walking, or weakness

    Call your doctor if:

    • Numbness or tingling has no obvious cause (like a hand or foot "falling asleep")
    • You have pain in your neck, forearm, or fingers
    • You are urinating more often
    • Numbness or tingling is in your legs and worsens when you walk
    • You have a rash
    • You have dizziness, muscle spasm, or other unusual symptoms
  • What to expect at your health care provider's office

    Your health care provider will take a medical history and perform a physical examination, with careful evaluation of your nervous system.

    Medical history questions may include the following:

    • What part or parts of your body have numbness or tingling? The trunk? Your legs or feet? Your arms, hands, or fingers?
    • Which side of your body is involved?
    • Which aspect of the specific body part? For example, is your inner thigh, calf, or foot affected? Your palm, fingers, thumb, wrist, or forearm?
    • Does the numbness or tingling affect your face? Around your eyes? Your cheeks? Around your mouth? Is one or both sides of your face involved?
    • Does the part of your body with numbness or tingling change colors? Does it feel cold or warm?
    • Do you have other abnormal sensations?
    • Do you ignore everything on the affected side?
    • How long have you had the numbness or tingling?
    • When did it start?
    • Does anything make it worse like exercise or standing for long periods of time?
    • Do you have any other symptoms?

    Your doctor may also ask you questions to determine your risk for stroke, thyroid disease, or diabetes, as well as questions about your work habits and medications.

    Blood tests may include:

    • Complete blood count ( CBC)
    • Electrolyte level (measurement of body chemicals and minerals)
    • Thyroid function tests
    • Measurement of vitamin levels
    • Heavy metal or toxicology screening

    Imaging tests may include:

    Other tests that may be done include:

    • Electromyography and nerve conduction studies to measure how your muscles respond to nerve stimulation
    • Lumbar puncture (spinal tap) to rule out central nervous system disorders
    • Cold stimulation test may be done to check for Raynaud's phenomenon
  • References

    American Diabetes Association (ADA). Standards of medical care in diabetes. VI. Prevention and management of diabetes complications. Diabetes Care. 2007 Jan;30(Suppl 1):S15-24.

    Creager MA, Libby P. Peripheral arterial disease. In: Libby P, Bonow RO, Mann DL, Zipes DP, eds. Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine. 8th ed. Saunders; 2007:chap 57.

    D'Cruz DP, Khamashta MA, Hughes GR. Systemic lupus erythematosus. Lancet. 2007 Feb 17;369(9561):587-96.

    Piazzini DB, Aprile I, Ferrara PE, et al. A systematic review of conservative treatment of carpal tunnel syndrome. Clin Rehabil. 2007;21(4):299-314.

    Rowland LP. Diagnosis of pain and paresthesias. In: Rowland LP, ed. Merritt’s Neurology. 11th ed. Baltimore, Md: Lippincott Williams & Wilkins; 2005:chap 5.

Review Date: 4/21/2009

Reviewed By: Jacob L. Heller, MD, Emergency Medicine, Virginia Mason Medical Center, Seattle, Washington, Clinic. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- 2014 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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