The invention relates to an apparatus for stimulating a healing process comprising a coil arrangement which is coupled to a functional power generator in order to generate an electromagnetic field in an affected body region, a control unit for influencing a voltage curve generated by the functional power generator in accordance with signals transmitted to an input interface of the control unit, a sensor array for sensing a characteristic of the affected body region, transmission device which is coupled to the sensor array in order to transmit a signal characteristic of the detected characteristic of the affected body zone to the control unit.