Dystonia examination is a method to check the muscle tension in the relaxed state, and can check whether the muscle is stiff or flaccid. Generally, the doctor holds one limb with both hands in a static and relaxed state, with the speed going from slow to fast and the amplitude going from small to large, repeatedly doing flexion and extension and rotation movements, and the slight resistance felt is the muscle tone of this limb, and then compare the two sides, or directly touch the muscle with the hand to measure the muscle tone from the stiffness.