When something major happens in your life, your body reacts. This is not just things related to your health or physical body, but to all aspects of your being. One of the common reactions is hair loss. We call this shock hair loss. It occurs when the body reacts to some type of significant and sudden shock, causing it to stop the growth cycle of the hair. Some hair falls out early. That may be a significant amount, which can be very frustrating to those who are seeing a lot of hair loss all at once.