where is pain in thumb from carpal tunnel
Â« Carpal Tunnel Interview on Blog Talk Radio | Main | Self Care is Critical for Carpal Tunnel & Thoracic Outlet Symptoms Â». If you have pain in your thumb, maybe it seems like Carpal Tunnel Syndrome, but... There are lots of reasons why you can have pain in your thumb, and most of them involve your muscles! Let's count the ways... There are muscles on the outside of your lower arm that cause pain in your thumb. There are muscles on the underside, or palm side, of your arm that refer pain into your thumb. Also, the muscles on the palm side of your thumb cause thumb pain. But, wait! There's more!