Carpal tunnel syndrome is a very common condition characterised by pain, tingling, numbness and altered sensation in the hand — most noticeably in the thumb, index finger and middle finger. Symptoms are often intermittent in the early stages and are commonly worse at night, frequently causing disturbed sleep. Many people notice that shaking the hand helps relieve the symptoms temporarily. Causes of Carpal Tunnel Syndrome? Carpal tunnel syndrome occurs when the median nerve be