Abstract: An electromagnetic wave emitting unit (1) formed by winding an emission coil (1-2) around a coil bobbin (1-1) is provided in a case (2). A current (for example, resonance frequency of 60 kHz, resonance current of 0.95 mA) is supplied from a power supply unit (3) to the emission coil (1-2) via a resonance circuit (4). With this operation, weak electromagnetic waves are emitted from the emission coil (1-2) to form an electromagnetic field (for example, magnetic flux density?6.7 nT, electric field strength?0.42 V/m) suitable for treating at a P-point. When an affected part is set at the P-point and in the vicinity thereof, a cytokine secretion is controlled. It is confirmed that inflammatory cytokines in an animal subjected to inflammation, for example, are significantly controlled. Efficacy is recognized in a range of 20 to 180 kHz, and especially a preferable result is obtained in the vicinity of 60 kHZ.