The hazards of microwave physiotherapy apparatus are mainly the following: 1, if there are metal objects in the body, or the surface attached to the metal body, will lead to metal heating, thus causing tissue burns, including some deep soft tissue burns. 2, if used for too long or too much power, can cause local burns and cause pain, or even cause scar formation. 3, some people with poor coagulation, or less platelets, if you do microwave physiotherapy for too long, can lead to local bleeding, or even hemorrhage, and the formation of subcutaneous tissue hematoma. 4, tumor patients if the use of microwave physiotherapy apparatus may lead to local bleeding, or even hemorrhage. If the microwave therapy is used for too long, it may lead to local bleeding, or even haemorrhage, and the formation of subcutaneous tissue haematoma. 4, tumor patients who use microwave therapy instrument may lead to the spread of cancer cells, or the rapid growth of cancer cells and cause the metastasis of tumors. 5, if there are some plastic items in the abdominal cavity, such as drains, may lead to brittle drainage tubes, or even fracture and some serious. If there are some plastic items in the abdominal cavity, such as drainage tubes, it may lead to brittle or even broken drainage tubes and some serious complications. In conclusion, the use of this instrument should be carried out under the guidance of a doctor.