More often than not, it arises from a repeated movement or forceful use within your finger or thumb. Tendons are fibrous cords that connect muscle to bone. Each tendon is surrounded by a protecting sheath.  Weak spot in Grip or Pinch Patients may experience issues in gripping objects or carrying https://www.theorthopaedicandpainpractice.com/why-cant-i-straighten-the-tip-of-my-finger/