Calcification (calcium deposits) can occur in the soft tissues of the body, such as heart valves, kidneys, liver, joints, cartilage, muscles, tendons, and many other parts of the anatomy. This is an abnormal occurrence that can be caused by various reasons. There might be a lack of vitamin K, a side effect of blood thinner medications. If there is a lack of dietary calcium, the body may take calcium from the bones to compensate. The body can send calcium to heal areas that have had injury or inflammation, therefore the calcium could deposit there if the system is not in balance. Also, the body’s overall mineral balance could be out of sync.