Carpal tunnel syndrome is due to compression of the median nerve as it goes through a passage in the wrist called the carpal tunnel. The median nerve controls the movement and feeling of your thumb, and the movement of all your fingers except your pinky.
The most common causes of carpal tunnel syndrome include:
Repetitive motions of the hands or wrists.
Pregnancy
Diabetes
A systematic review of 32 clinical trials found that mild to moderate carpal tunnel syndrome typically responds well to conservative care, and early diagnosis and treatment leads to decreased healing time and better outcomes. If the symptoms progressively worsen and remain untreated, the compression of the nerves can lead to permanent impairment.