What is Carpal Tunnel Syndrome?
The carpal tunnel is a narrow passage at the wrist formed by bones and ligaments, through which the median nerve and flexor tendons pass. Carpal tunnel syndrome occurs when pressure within this tunnel increases, compressing the median nerve. This leads to sensory symptoms in the thumb, index, middle, and part of the ring finger, and in more advanced cases can cause weakness of the thumb muscles. The condition may occur without an obvious cause or be associated with factors such as repetitive hand use, diabetes, thyroid disease, pregnancy, or inflammatory conditions.