The carpal tunnel is a passageway through the wrist carrying tendons and one of the hand's major nerves. Pressure may build up within the tunnel because of disease (such as rheumatoid arthritis), injury, fluid retention during pregnancy, overuse, or repetitive motions. The resulting pressure on the nerve within the tunnel causes a tingling sensation in the hand, often accompanied by numbness, aching, and impaired hand function. This is known as carpal tunnel syndrome.
In some cases, splinting of the hand and anti-inflammatory medications will relieve the problem. If this doesn't work, however, surgery may be required.
In the operation, the surgeon makes an incision from the middle of the palm to the wrist. He or she will then cut the tissue that's pressing on the nerve, in order to release the pressure. A large dressing and splint are used after surgery to restrict motion and promote healing. The scar will gradually fade and become barely visible.
The results of the surgery will depend in part on how long the condition has existed and how much damage has been done to the nerve. For that reason, it's a good idea to see a doctor early if you think you may have carpal tunnel syndrome.