Carpal tunnel syndrome is caused when the nerve that runs from the hand down into the forearm, called the median nerve, becomes compressed or pinched. This nerve runs through the carpal tunnel which is like a tunnel or canal that is located in the wrist. Inside this tunnel are nine flexor tendons that run through the hand. On the outside of the tunnel are bones and a transverse carpal ligament. Anytime the size of the tunnel is decreased the median nerve can be compressed. This can be done simply by bending the wrist or through swelling of tissues around the tendons. When the median nerve gets compressed it causes burning, numbness or tingling in the hand and fingers. Often the pain can be felt more in the thumb, index and middle fingers. Weakness in the hand and wrist muscles is also very common. One of the most frequent signs of carpal tunnel syndrome is waking at night with pain, tingling or numbness in the wrist and hand. Because people tend to flex their wrists and sleep with them bent, it causes narrowing of the carpal tunnel.

Research has shown that carpal tunnel syndrome is actually three times more likely to develop in women than men. Quite possibly this is a result in women(adminname：admin)