Many people visit hand therapy clinics with complaints of a painful thumb. While this issue used to primarily affect women over the age of 55, we're now seeing more younger men and women experiencing similar discomfort. One of the primary causes of painful thumb is a condition known as trapeziometacarpal osteoarthritis, or rhizarthrosis. Recent research by Collona and Borghi provides a thorough overview of this condition and explores various conservative treatment options.