CTS is often caused by repetitive motions or activities that put stress on the wrist. Some common causes and risk factors include:
Repetitive hand movements, especially those that involve flexing the wrist. Conditions such as diabetes, rheumatoid arthritis, and thyroid dysfunction. Pregnancy, due to fluid retention that can increase pressure on the median nerve. Heredity, as some people may have smaller carpal tunnels which predispose them to CTS. Workplace factors involving the use of vibrating tools or assembly line work.