While the benefits of the knife surgery include pain relief and release of adhesions, there may also be hazards such as damage to nerves and blood vessels. Knife therapy is a combination of the “needle” of acupuncture therapy and the “knife” of surgical therapy. Through the cutting of the knife, the mechanical compression of adhesions and purpura is lifted, and the pulling effect on the sensory nerve endings is achieved, so as to achieve the effect of pain relief and treatment. Since knife surgery requires the knife to penetrate into the lesion and cut and peel off the adherent scar tissue, it may damage the nerves and blood vessels, resulting in hematoma. When it is necessary to undergo small-needle knife surgical treatment, one should go to a regular hospital and under the guidance of a doctor, meet the indications as well as exclude the contraindications before proceeding.