Injection pain, according to the classification of pain level is generally 1 to 3, that is, mild pain. Pain level division is mainly divided by the patient’s subjective consciousness, the individual’s tolerance level of pain is different, the pain level situation is also different. According to the severity of pain, generally can be divided into 0~10 grade. Among them, level 0 has no pain, level 1~3 is mild pain, which generally does not affect sleep; if the pain affects sleep, it may be around level 4~6; if the patient’s pain is so severe that he or she can’t sleep, it will be around level 7; level 8~9 is severe pain, and level 10 is severe pain. As far as real life and clinical work are concerned, the pain situation that arises after needling the tissues is graded around 1~3, which will not affect sleep, and the localized pain will slowly subside at the end of the injection. However, due to the different pain tolerance of individuals, after the end of the injection, it is still recommended that the patient rest properly to promote the local pain to subside.