Carpal tunnel syndrome is a condition in which there is excessive pressure on the median nerve. This is the nerve in the wrist that allows feeling and movement to parts of the hand. Carpal tunnel syndrome can lead to numbness, tingling, weakness, or muscle damage in the hand and fingers. The median nerve provides feeling and movement to the thumb side of the hand.
Carpal tunnel syndrome: MedlinePlus Medical Encyclopedia
It can be alarming to lose feeling in any part of your body. But losing feeling in one or both of your thumbs might seem especially odd. Thumbs help us hold cups, open bottles, and type on our smartphones. Numb thumbs can make these and many other tasks much more difficult to do.
Phone: Fax: Used with permission from the American Society for Surgery of the Hand. Although carpal tunnel syndrome is common, it is not the only cause of numbness, tingling, and pain in the forearm and hand.
Numbness and tingling are common problems, and the nerve supply to the thumb and hand is complicated. If you feel a numbness in your thumb or hand, nerve compression is a likely cause. While it is less common, it's important to know if the cause is something dangerous. However, the numbness is often associated with other symptoms in these cases. Numbness should be evaluated as soon as possible if it comes on suddenly, is accompanied by other problems such as weakness , has no obvious cause such as falling asleep on the arm , or is associated with neck or chest discomfort.