When the fascia is in a sliding state as far as possible and maintains a certain tension, the fascia knife gives mechanical shear force, accelerates the metabolism of the fascia, depolymerizes hyaluronic acid, changes from macromolecules to micromolecules, and the gel changes from solid to liquid, so that the fascia will restore its flexibility of movement. The pressure and special technique of fasciotomy make the fascia bear no dead angle in a large area, which is incomparable to traditional massage techniques.