Why do I get a sharp pain in my thumb joint exclusively from using heavy metal pliers?
1. Introduction The sharp, stabbing pain localized in the base of the thumb when using heavy metal pliers is driven by the extreme concentration of mechanical shear force upon the highly mobile carpometacarpal joint. The human thumb is a biomechanical masterpiece designed for fine dexterity and opposing grasp, but it is structurally vulnerable to heavy, … Read more