Treatment Choice - Treatment Choice | Compare Prices | Find Hospital | Carpal tunnel syndrome (CTS) is a relatively common condition that causes a tingling sensation, numbness and sometimes pain in the hand and fingers.<br/>Usually, these sensations develop gradually and start off being worse during the night. They tend to affect the thumb, index finger and middle finger.<br/>Other symptoms of carpal tunnel syndrome include:<br/>- pins and needles (paraesthesia)<br/>- thumb weakness<br/>- a dull ache in the hand or arm