State change notification device, wearable communication device and state change notification method

A state change notification device for notifying a user, by use of a wearable communication device, of a change in state of a device in which an external communication device or the state change notification device is provided, the state change notification device comprising:

• an information receiving circuit for receiving state change information on a change in state in a case where the change in state occurs in the device in which the external communication device or the state change notification device is provided;
• and
• an expansion control circuit for controlling expansion of an expandable circuit that is provided in contact with a part of user's body in the wearable communication device, the expansion control circuit controlling expansion of the expandable circuit in accordance with the state change information received by the information receiving circuit, so as to cause an inner pressure of the expandable circuit to become a user-perceivable pressure, the user-perceivable pressure being a set pressure that allows a user to perceive expansion of the expandable circuit.