The specific relief of painful injections has to be clarified as to the cause, which has a lot to do with whether it is physiological or pathological. In addition, it is also related to the nature of the fluid infusion, irritation, etc., so as soon as possible to assess, such as to go to the vascular surgery department to do ultrasound or imaging, to clarify the cause and actively treat the cause, you can first slow down the infusion rate, you can also heat the fluid or auxiliary heat compress, etc., can relieve the pain caused by vasculitis, its effect is good, if necessary, if the fluid irritation is large, it is necessary to suspend the infusion, change the irritation of small fluid, etc., and so on. Good control for 1-2 hours can be relieved.