In 1877, Massachusetts passed the Nation's first factory inspection law. It required guarding of belts, shafts, and gears, protection on elevators, and adequate fire exits. Its passage prompted a flurry of State factory acts.
These muscles can cause pain in the right upper back after injuries, such as a muscle strain or bruise from a car accident or fall. Overuse from work or recreational activities, such as painting or playing racket sports, might also be to blame -- especially for people who are right handed.
However, diseases of the gallbladder, spleen, pancreas, and other neighboring organs may also cause pain in the upper right side of the abdomen. Sharp, stabbing pain is mostly associated with severe liver conditions, gallbladder diseases, and pancreatic disorders.