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Causes
By Mayo Clinic staffIt's not always easy to pinpoint the cause of peripheral neuropathy, because a number of factors can cause neuropathies. These factors include:
- Trauma or pressure on the nerve. Traumas, such as motor vehicle accidents, falls or sports injuries, can sever or damage peripheral nerves. Nerve pressure can result from using a cast or crutches, spending a long time in an unnatural position, or repeating a motion many times — such as typing.
- Diabetes. When damage occurs to several nerves, the cause frequently is diabetes. At least half of all people with diabetes develop some type of neuropathy.
- Vitamin deficiencies. B vitamins — B-1, B-6 and B-12 — are particularly important to nerve health. Vitamin E and niacin also are crucial to nerve health.
- Alcoholism. Many alcoholics develop peripheral neuropathy because they have poor dietary habits, leading to vitamin deficiencies.
- Infections. Certain viral or bacterial infections can cause peripheral neuropathy, including Lyme disease, shingles (varicella-zoster), Epstein-Barr, hepatitis C and HIV/AIDS.
- Autoimmune diseases. These include lupus, rheumatoid arthritis and Guillain-Barre syndrome.
- Other diseases. Kidney disease, liver disease and an underactive thyroid (hypothyroidism) also can cause peripheral neuropathy.
- Inherited disorders. Examples include Charcot-Marie-Tooth disease and amyloid polyneuropathy.
- Tumors. Growths can form directly on the nerves themselves, or tumors can exert pressure on surrounding nerves. Both cancerous (malignant) and noncancerous (benign) tumors can contribute to peripheral neuropathy.
- Exposure to poisons. These may include some toxic substances, such as heavy metals, and certain medications — especially those used to treat cancer (chemotherapy).
References
- Peripheral neuropathy fact sheet. National Institute of Neurological Disorders and Stroke. http://www.ninds.nih.gov/disorders/peripheralneuropathy/detail_peripheralneuropathy.htm. Accessed Aug. 28, 2009.
- Peripheral nervous system and motor unit disorders. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merck.com/mmpe/print/sec16/ch223/ch223a.html. Accessed Aug. 29, 2009.
- Ropper AH, et al. Diseases of the peripheral nerves. In: Ropper AH, et al. Adams and Victor's Principles of Neurology. 9th ed. New York, N.Y.: McGraw-Hill Companies; 2009. http://www.accessmedicine.com/content.aspx?aID=3641268. Accessed Aug. 29, 2009.
- Feldman EL, et al. Treatment of diabetic neuropathy. http://www.uptodate.com/home/index.html. Accessed Aug. 18, 2009.
- Pai S. Peripheral neuropathy. In: Rakel D. Integrative Medicine. 2nd ed. Philadelphia, Pa.: Saunders Elsevier; 2007. http://www.mdconsult.com/das/book/body/156944782-3/0/1494/62.html#4-u1.0-B978-1-4160-2954-0..50019-3--cesec2_528. Accessed Aug. 29, 2009.
- Dietary supplement fact sheet: Vitamin B12. Office of Dietary Supplements. http://ods.od.nih.gov/factsheets/vitaminb12.asp. Accessed Aug. 28, 2009.
