The hazards of microwave physiotherapy instrument are mainly in the following aspects: 1, if there are metal objects in the body, or when there is a metal body attached to the surface, it will lead to metal heating, which will cause tissue burns, including some deep soft tissue burns.2, if the use of time is too long or power is too large, it can cause localized burns and pain, and it will even cause the formation of keloid scars.3, some of the people with poorer coagulation function. Or people with low platelet, if doing microwave physiotherapy for too long, it can cause local bleeding, even hemorrhage, and form subcutaneous tissue hematoma.4. Tumor patients, if using microwave physiotherapist, it may lead to proliferation of cancer cells, or rapid growth of cancer cells and cause metastasis of tumors.5. If there are some plastic items in the abdominal cavity, such as drainage tubes, etc., it may lead to brittle cracking of drainage tubes or even breakage and some serious problems may occur. or even fracture and some serious complications may occur. All in all, the use of this instrument needs to be carried out under the guidance of doctors.