The calcium is mineral essential to have strong bones and healthy teeth and as well as being essential for our body to function well. In addition the body needs calcium to make muscles to contract properly, the blood to clot and so that nerves can also make their function, which is the transmission of nerve impulses.
Nevertheless when the organism presents disorders that prevent you metabolize well this mineral occurs the calcification. We can say that calcification occurs when calcium accumulating in the body is either dissolved by the blood and deposited in other areas of the body such as tissues.
In the case in which calcium builds up in the tissues occurs that the tissue hardens with what the movement is shortened.
Excess calcium could be on the shoulder, it produces mobility in the muscles that surround it, where calcium has been deposited also causing pain to the movement.