Neuropathy means nerve disease or damage. Diabetic neuropathy is nerve damage caused by diabetes. People with diabetes often have high blood sugar levels. Over time, high blood sugar levels can damage nerves throughout your body.
There are three kinds of diabetic neuropathy.
Over time, high blood sugar levels from diabetes can damage nerves throughout your body. The higher your blood sugar levels, the more likely you are to have nerve damage. So controlling your blood sugar throughout your life is very important.
The older you get, and the longer you have diabetes, the more likely you are to have nerve damage. People with diabetes who drink too much alcohol are also more likely to have nerve damage.
About half of all people who have diabetes end up getting diabetic neuropathy.1
Your symptoms will depend on which nerves are injured. You may not be able to feel pain, especially in your feet. This can lead to serious infections, because sores or other problems may not get treated.
When other parts of your body are affected, symptoms may include:
Your doctor will check how well you feel light touch and temperature and will test your strength and your reflexes. Tests such as electromyogram and nerve conduction studies may be done to confirm the diagnosis. You may need other tests to see which type of neuropathy you have and to help guide your treatment.
Doctors can't test for all types of nerve damage. So it’s important to tell your doctor about any pain or weakness you feel. Also mention heavy sweating or dizziness and any changes in digestion, urination, and sexual function.
Treatment involves keeping blood sugar levels in a target range. This will not cure the nerve damage, but it can help keep the damage from getting worse.
The type of treatment depends on your symptoms:
It is common in diabetes to lose some feeling in your feet. You could have a sore or other foot problem without noticing it. Check your feet every day. An untreated problem on your foot can lead to a serious infection or even amputation.
Be clear with your doctor about what is helping you feel better and what is not. You and your doctor can work together to find the treatment that helps you the most.
Keeping your blood sugar levels in a target range may help prevent neuropathy from ever developing. The best way to do this is by getting to and staying at a healthy weight by exercising and eating healthy foods.
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Diabetic neuropathy—especially peripheral neuropathy—initially may not cause any noticeable symptoms. If you have diabetes, it is important to have regular medical checkups to check for signs of neuropathy and treat problems before they become serious.
Symptoms of diabetic neuropathy may vary depending on the type of neuropathy you have.
Peripheral neuropathy tends to develop slowly over months or years. In general, symptoms may include:
Autonomic neuropathy may affect digestion, the body's ability to regulate temperature, urination, sexual function, and heart and blood vessel function, including blood pressure. Symptoms may get worse during pregnancy. In general, symptoms may include:
Symptoms of focal neuropathy usually appear suddenly. They may include:
Symptoms of focal neuropathy usually get better over time. But focal neuropathy may be permanent.
A diagnosis of diabetic neuropathy is based largely on your symptoms, medical history, and neurologic examination. During a neurologic exam, your doctor will check how well you feel light touch, temperature, pain, and movement. Your doctor will also check your strength and reflexes. Electromyogram (EMG) and nerve conduction studies may be done to confirm a diagnosis. These tests measure how well and how quickly the nerves and muscles conduct electrical impulses. When nerve damage is present, the speed of nerve function slows.
Problems associated with autonomic neuropathy—which affects the nerves that control internal functions—can be difficult to diagnose. When new symptoms develop, further testing may be needed to diagnose the problem, identify the cause, and guide treatment. For example, a study that measures how fast your stomach empties may be done if symptoms like bloating, indigestion, or vomiting suggest gastroparesis, a condition that causes the stomach to take too long to empty.
Nerve problems in people with diabetes may be caused by other conditions, such as kidney disease, alcohol dependence, or a vitamin B12 deficiency. A variety of laboratory tests (such as a complete blood count) may be used to screen for conditions other than diabetes that could be causing symptoms. Your symptoms and medical history will determine which tests are needed.
For some diseases, doctors can use screening tests to look for problems before you have any symptoms. But doctors cannot test for all types of autonomic or focal neuropathy. So it is important to report to your doctor any pain, weakness, or motor problems you have. Also mention any changes in digestion, urination, sexual function, sweating, or dizziness. Your doctor will also look for signs of autonomic neuropathy during your physical exams.
Screening for peripheral neuropathy can help prevent foot ulcers and amputation. The American Diabetes Association (ADA) recommends that people who have diabetes see a doctor to examine their feet for cracked or peeling skin, excessive or reduced sweating, blisters, calluses, ulcers, signs of infection, bone and joint abnormalities, and walking and balance—during each medical visit. The ADA also recommends a complete foot exam by a doctor at least once a year.2 This examination can detect a loss of sensation in your feet, which can lead to more serious foot problems.
Good control of diabetes over time is the key to treating diabetic neuropathy. There is no cure for neuropathy, but keeping your blood sugar within a target range can reduce symptoms and prevent them from getting worse.
To help control your diabetes, eat food that is good for you and exercise. Controlling diabetes means maintaining blood sugar levels (A1c) within the target range. This will do more than anything else to help prevent diabetic neuropathy from getting worse.
For more information on good diabetes control, see the topics Type 1 Diabetes: Living With the Disease or Type 2 Diabetes: Living With the Disease.
Treatment for diabetic neuropathy depends on your symptoms and the type of neuropathy that you have. In general, treatment focuses on reducing current symptoms and preventing the condition from getting worse by keeping your blood sugar level (A1c) within a narrow target range. You can keep your blood sugar levels within the target range by taking your insulin or oral diabetes medicine as prescribed, checking your blood sugar levels, following your diet for diabetes, exercising, and seeing your doctor regularly. For more information, see the topics Type 1 Diabetes: Living With the Disease or Type 2 Diabetes: Living With the Disease.
Also, it is important to properly care for your feet when you have diabetic neuropathy. Diabetic neuropathy may cause a loss of feeling in your feet. It is possible for a sore or other foot problem to go unnoticed. Without proper foot care, an untreated foot sore can lead to a serious infection or possibly amputation. For more information, see:
It is also wise to maintain healthy habits such as seeing your doctor regularly, controlling your blood pressure, eating a balanced diet, exercising regularly, not smoking, and limiting or avoiding alcohol. Additional treatment depends on the specific type of diabetic neuropathy that you have along with your current symptoms.
Many people with peripheral neuropathy have mild to severe pain in specific parts of their bodies. Talk with your doctor about treatment that can reduce your pain and improve your physical functioning, mood, and mental well-being. These treatments may include:
Autonomic neuropathy—which affects nerves that regulate internal functions—can affect digestion, urination, sweating, sexual function, blood pressure, and other involuntary body functions. Some symptoms of autonomic neuropathy can be hard to manage, but others respond well to treatment:
Ongoing treatment for diabetic neuropathy includes making sure your blood sugar levels stay tightly controlled within a narrow target range. You also need to practice wise health habits such as seeing your doctor regularly, controlling your blood pressure, getting regular exercise, limiting or avoiding alcohol, and not smoking. Also, take good care of your feet so that foot sores and other foot problems do not develop. For more information, see:
Other treatment is tailored to your specific symptoms and the type of diabetic neuropathy that you have.
Many people who have peripheral neuropathy—which affects nerves that supply sensation and touch—have mild to severe pain in specific parts of their bodies. Treatment can reduce pain and improve physical functioning, mood, and mental well-being and may include:
Autonomic neuropathy—which affects nerves that regulate internal functions—can cause problems with digestion, urination, sweating, sexual function, blood pressure, and other involuntary body functions. Some symptoms of autonomic neuropathy can be hard to manage, but others respond well to treatment:
If diabetic neuropathy gets worse, you may have serious problems such as severe gastroparesis, bladder infections, or foot problems. In addition to striving for tightly controlled, target range A1c levels and taking good care of your feet, you may need further treatment if diabetic neuropathy progresses.
Diabetic neuropathy is a major risk factor for foot infections or foot ulcers leading to amputation.7 It is possible to have permanent disfigurement in one or both of your feet (such as Charcot foot) from diabetic neuropathy. Surgery is sometimes needed to correct deformed joints that can result from Charcot foot. See a picture of Charcot foot.
Severe gastroparesis may require other treatment, such as medicines that empty the stomach more quickly or a feeding tube that is inserted into the stomach.6
Severe bladder infections or other bladder problems, such as loss of control, may require further diagnostic testing and treatments such as medicines or surgery to improve bladder function.
Also, it is common to experience symptoms of depression with any chronic disease, such as diabetes or diabetic neuropathy. Seeking help for depression may improve your overall well-being and aid in the treatment of your condition.
No matter what you or your doctor try, you may not be pain-free. Be clear with your doctor about what is helping and what is not. You and your doctor can work together to find the right combination of medicine and other treatments to help you the most.
In addition to having regular medical checkups, the best way to avoid the progression of diabetic neuropathy is to control your blood sugar, take good care of your feet, and practice wise health habits.
The single most important step you can take to prevent the development and progression of diabetic neuropathy is to keep your blood sugar level (A1c) consistently within a tightly controlled and narrow target range.
Keeping your blood sugar level within the target range also helps decrease your chances of getting other complications from diabetes, such as eye disease and kidney problems. For more information, see the topic Type 1 Diabetes: Living With the Disease or Type 2 Diabetes.
Diabetic neuropathy affects the feet more often than any other part of the body. Diabetes interferes with your body's ability to fight infection, so that even a minor foot injury such as a blister, a scratch, or athlete's foot can lead to serious infections or amputation. But serious foot problems are the most preventable complications of diabetes.
Because the nerve damage caused by diabetic neuropathy may make you less likely to notice minor problems with your feet, it is wise to inspect your feet every day. Protect them from injury by wearing properly fitted shoes and socks at all times. Woolen socks are the softest and can help prevent minor injuries. If vision problems from diabetic retinopathy or another eye disease make it hard for you to examine your feet, have someone help you.
For more information, see:
If you have severe numbness, a history of skin sores, or bone and joint deformities (such as Charcot foot), you may benefit from custom-fitted shoes. Medicare and some health insurance plans will pay for these shoes if they are needed.
Many doctors believe that you can further reduce your risk of getting severe neuropathy if you:
| American Diabetes Association (ADA) | |
| 1701 North Beauregard Street | |
| Alexandria, VA 22311 | |
| Phone: | 1-800-DIABETES (1-800-342-2383) |
| Email: | AskADA@diabetes.org |
| Web Address: | www.diabetes.org |
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The American Diabetes Association (ADA) is a national organization for health professionals and consumers. Almost every state has a local office. ADA sets the standards for the care of people with diabetes. Its focus is on research for the prevention and treatment of all types of diabetes. ADA provides patient and professional education mainly through its publications, which include the monthly magazine Diabetes Forecast, books, brochures, cookbooks and meal planning guides, and pamphlets. ADA also provides information for parents about caring for a child with diabetes. |
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| National Diabetes Education Program (NDEP) | |
| 1 Diabetes Way | |
| Bethesda, MD 20814-9692 | |
| Phone: | 1-800-438-5383 to order materials (301) 496-3583 |
| Email: | ndep@mail.nih.gov |
| Web Address: | http://ndep.nih.gov |
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The National Diabetes Education Program (NDEP) is sponsored by the U.S. National Institutes of Health (NIH) and the U.S. Centers for Disease Control and Prevention (CDC). The program's goal is to improve the treatment of people who have diabetes, to promote early diagnosis, and to prevent the development of diabetes. Information about the program can be found on two Web sites: one managed by NIH (http://ndep.nih.gov) and the other by CDC (www.cdc.gov/team-ndep). |
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| National Diabetes Information Clearinghouse (NDIC) | |
| 1 Information Way | |
| Bethesda, MD 20892-3560 | |
| Phone: | 1-800-860-8747 |
| Fax: | (703) 738-4929 |
| TDD: | 1-866-569-1162 toll-free |
| Email: | ndic@info.niddk.nih.gov |
| Web Address: | http://diabetes.niddk.nih.gov |
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This clearinghouse provides information about research and clinical trials supported by the U.S. National Institutes of Health. This service is provided by the National Institute of Diabetes and Digestive and Kidney Disease (NIDDK), a part of the National Institutes of Health (NIH). |
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Citations
- Ropper AH, Samuels MA (2009). Diseases of the peripheral nerves. In Adams and Victor's Principles of Neurology, 9th ed., pp. 1277–1319. New York: McGraw-Hill.
- American Diabetes Association (2004). Preventive foot care in diabetes. Clinical Practice Recommendations 2004. Diabetes Care, 27(Suppl 1): S63–S64.
- Boulton AJM, et al. (2004). Diabetic somatic neuropathies. Diabetes Care, 27(6): 1458–1486.
- Dubinsky RM, et al. (2010). Assessment: Efficacy of transcutaneous electric nerve stimulation in the treatment of pain in neurologic disorders (an evidence-based review): Report of the Therapeutics and Technology Assessment Subcommittee of the American Academy of Neurology. Neurology, 74(1): 173–176.
- Brownlee M, et al. (2008). Complications of diabetes mellitus. In PR Larsen et al., eds., Williams Textbook of Endocrinology, 11th ed., pp. 1417–1498. Philadelphia: Saunders Elsevier.
- Vinik AI, et al. (2003). Diabetic autonomic neuropathy. In D Porte Jr et al., eds. Ellenberg and Rifkin's Diabetes Mellitus, 6th ed., pp. 789–804. New York: McGraw-Hill.
- Jeffcoate WJ, Harding KG (2003). Diabetic foot ulcers. Lancet, 361(9368): 1545–1551.
Other Works Consulted
- American Diabetes Association (2004). Physical activity/exercise and diabetes. Clinical Practice Recommendations 2004. Diabetes Care, 27(Suppl 1): S58–S62.
- American Diabetes Association (2005). Diabetic neuropathies. Position statement. Diabetes Care, 28(4): 956–962.
- Brannagan TH (2010). Acquired neuropathies. In LP Rowland, TA Pedley, eds., Merritt's Neurology, 12th ed., chap. 134, pp. 832–833. Philadelphia: Lippincott Williams and Wilkins.
- Brownlee M, et al. (2008). Complications of diabetes mellitus. In PR Larsen et al., eds., Williams Textbook of Endocrinology, 11th ed., pp. 1417–1498. Philadelphia: Saunders Elsevier.
- Frykberg RG, et al. (2006). Diabetic foot disorders: A clinical practice guideline. Journal of Foot and Ankle Surgery, 45(Suppl 5): S1–S66. Also available online: http://www.acfas.org/pubresearch/cpg/diabetic-cpg.htm.
- Ganchi PA, Eriksson E (2005). Diabetes mellitus and wound healing. In CR Kahn et al., eds., Joslin's Diabetes Mellitus, 14th ed., pp. 1133–1144. Boston: Joslin Diabetes Center.
- Hunt D (2009). Diabetes: Foot ulcers and amputations, search date November 2007. Online version of BMJ Clinical Evidence: http://www.clinicalevidence.com.
- Masharani U, German MS (2007). Diabetic ketoacidosis section of Pancreatic hormones and diabetes mellitus. In DG Gardner et al., eds., Greenspan's Basic and Clinical Endocrinology, 8th ed., pp. 716–722. New York: McGraw-Hill.
- Molitch ME, Genuth S (2006). Complications of diabetes mellitus. In DC Dale, DD Federman, eds., ACP Medicine, section 9, chap. 3. New York: WebMD.
- Tentikiyrus N, et al. (2008). Evaluation of the self-administered indicator plaster neuropad for the diagnosis of neuropathy in diabetes. Diabetes Care, 31(2): 236–237.
- Wong M, et al. (2007). Effects of treatments for symptoms of painful diabetic neuropathy: Systematic review. BMJ. Published online June 11, 2007 (doi:10.1136/bmj.39213.565972.AE).
| By | Healthwise Staff |
|---|---|
| Primary Medical Reviewer | Anne C. Poinier, MD - Internal Medicine |
| Specialist Medical Reviewer | Barrie J. Hurwitz, MD - Neurology |
| Last Revised | May 13, 2010 |
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Author: Healthwise Staff
Medical Review: Anne C. Poinier, MD - Internal Medicine & Barrie J. Hurwitz, MD - Neurology
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