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Risk factors
By Mayo Clinic staffSome research suggests that carpal tunnel syndrome can result from overuse or strain in certain job tasks that require a combination of repetitive, forceful, and awkward or stressed motions of your hands and wrists. Examples of these include using power tools — such as chippers, grinders, chain saws or jackhammers — and heavy assembly line work, such as occurs in a meatpacking plant. Although repetitive computer use is commonly assumed to cause carpal tunnel syndrome, the scientific evidence for this association isn't definitive.
Although it's not clear which activities can cause carpal tunnel syndrome, if your work or hobbies are hand-intensive — involving a combination of awkward, repetitive wrist or finger motions, forceful pinching or gripping, and working with vibrating tools — you may be at higher risk of developing the condition.
Other risk factors include:
- Your sex. Women are three times as likely as men are to develop carpal tunnel syndrome, according to the National Institute of Neurological Disorders and Stroke.
- Heredity. You may be significantly more likely to develop carpal tunnel syndrome if close relatives have had the condition. Inherited physical characteristics, such as the shape of your wrist, may make you more susceptible.
- Certain health conditions. Conditions including some thyroid problems, diabetes, obesity and rheumatoid arthritis can increase your risk. People with end-stage kidney disease also are more likely to develop carpal tunnel syndrome. Women who are pregnant, taking oral contraceptives or going through menopause also are at increased risk, most likely due to hormonal changes. Fluid retention may be a cause of carpal tunnel syndrome during pregnancy. Fortunately, carpal tunnel syndrome related to pregnancy almost always improves after childbirth.
- Carpal tunnel syndrome fact sheet. National Institute of Neurological Disorders and Stroke. http://www.ninds.nih.gov/disorders/carpal_tunnel/detail_carpal_tunnel.htm. Accessed Dec. 5, 2008.
- Carpal tunnel syndrome. American Academy of Orthopaedic Surgeons. http://orthoinfo.aaos.org/topic.cfm?topic=a00005. Accessed Dec. 5, 2008.
- Carpal tunnel syndrome. American Society for Surgery of the Hand. http://www.assh.org/Content/NavigationMenu/PatientsPublic/HandConditions/CarpalTunnelSyndrome/Carpal_Tunnel_Syndr.htm. Accessed Dec. 5, 2008.
- Sheon RP. Clinical manifestations and diagnosis of carpal tunnel syndrome. http://www.uptodate.com/home/index.html. Accessed Nov. 25, 2008.
- Sheon RP. Etiology of carpal tunnel syndrome. http://www.uptodate.com/home/index.html. Accessed Nov. 25, 2008.
- Scott KR, et al. Treatment of carpal tunnel syndrome. http://www.uptodate.com/home/index.html. Accessed Nov. 25, 2008.
- Hunter AA, et al. Surgery for carpal tunnel syndrome. http://www.uptodate.com/home/index.html. Accessed Nov. 25, 2008.
