The present disclosure provides a high-frequency thermotherapy device comprising: an impedance sensing module configured to measure impedances of normal and abnormal muscles; a control module configured to receive the measurement impedance from the impedance sensing module and to determine whether the abnormal muscle is detected; a frequency and output adjustment module configured to automatically generate a frequency adjustment signal to enable a about 2 to 5 MHz frequency to be generated upon determination that the abnormal muscle is detected.
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