More often than not, it originates from a recurring movement or forceful use within your finger or thumb. Tendons are fibrous cords that attach muscle to bone. Each individual tendon is surrounded by a protecting sheath.  Widespread indicators for operation consist of persistent suffering, loss of functionality, or structural abnormalities https://www.theorthopaedicandpainpractice.com/why-cant-i-straighten-the-tip-of-my-finger/