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.
It may seem odd that you would only develop pain on one side of your body after eating, but if you have gallstones, you may only feel pain on your right side. Gallstones are clusters of deposits that form in your gallbladder that can cause severe pain in your right side if a stone becomes lodged in the duct. If you develop pain in your right side, you need to make an appointment with your doctor or a general surgeon to determine whether or not you have gallstones.