If the needle punctures the sciatic nerve during a spanking injection, there will be localized discharge-like pain at the place of puncture, which, in addition to the pain in the buttocks, will also radiate to the back of the thighs, as well as the back of the calves, and may radiate to the back of the foot or the bottom of the foot, resulting in neuropathic tugging pain, numbness, and fatigue. If the puncture is severe, there may be residual symptoms even after the puncture is completed, such as lower limb weakness and limping due to sciatic nerve edema. If the nerve puncture is not very serious, the symptoms will disappear immediately after the transient radiating pain, and walking will not be affected.