Electromagnetic wave therapy instrument mainly uses the principle of electromagnetic waves to act on local skin and soft tissues to promote local blood circulation, speed up tissue repair and accelerate the absorption of inflammatory factors by generating heat. The hazards are as follows: 1. irradiation near the heart, if the patient has a pacemaker installed, electromagnetic waves may affect the pacemaker, resulting in abnormal pacemaker function, which may be life-threatening. 2. harm to the local skin and soft tissues, due to the excessive heat generated by the burn resulting in local pain, and in serious cases, blister formation. 3. to patients with coagulation Patients with coagulation disorders may experience spontaneous rupture and bleeding of subcutaneous capillaries, resulting in the formation of subcutaneous hematomas.