In the environment to stimulate the body caused by a non-specific response, that we often talk about stress. Cannon is defined as the external pressure, the pressure stimulus events, personal relationships, work, and changes in economic conditions of life will be pressure to bear. Pressure also refers to the spiritual experience outside influences brought about by psychological stress, or pain, a result of these factors make people feel bad state of mind, looking sluggish, heavy heart and even more painful.
