Organomegaly involves the enlargement of body organs. Many different factors may cause such enlargement. While some causes are benign, others are more serious. Heart enlargement, liver enlargement, and spleen enlargement â called cardiomegaly, hepatomegaly, and splenomegaly, respectively â represent three examples of abnormal organ enlargement.
Thumb pain can result from damage or injury to any of the structures in your thumb, including bones, joints, tendons, nerves, muscles, blood vessels, connective tissue, skin or fingernails. The symptoms may be constant or they may vary, and they may improve or worsen with movement.
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!