If you want to have a spanking injection with less pain, you can do epidermal anesthesia, commonly used is to use oxybutynin applied to the injected skin, usually wait for about 5-10 minutes, wait for the epidermis to have the feeling of local anesthesia, and then do a local puncture, which can relieve the pain. If you want to relieve local drug irritation or pain caused by soft tissue injury after a spanking injection, you can generally do local hot compresses. However, it must be localized after the needle opening is completely pressed, bleeding is static, after 1-2 hours and then hot compresses, can promote the local drug absorption, thus reducing the stimulation of the drug on the tissue and relieve pain. In addition, it can also promote local blood circulation and relieve pain caused by soft tissue injury.