The converted sugar electrolyte contains a certain amount of potassium as well as various electrolytes and other components. During the infusion process, if the speed is fast, the peripheral veins can cause local painful irritation in the superficial veins, but this pain is usually not very obvious, so patients do not need to worry. Some doctors may need to add a certain amount of electrolytes, such as potassium, to the converted sugar electrolytes according to the condition, which can cause great irritation to the veins, especially the superficial veins, if the peripheral veins are infused a little faster. If a central venous puncture such as subclavian vein is performed, the effect is not significant. It is necessary to adjust the infusion rate according to the situation or withdraw the conversion of sugar electrolytes and potassium supplementation during the infusion, which can reduce the pain. It is important to perform a problem-specific analysis and to put the patient’s condition first.