Children’s indwelling needles generally need to be replaced with a few days, mainly according to the specific circumstances of the child after the indwelling needle is buried, should be a specific analysis of specific problems, not a generalization. The indwelling needle is a soft needle that can be used for 7-10 days according to the instruction manual, but it is generally recommended that the indwelling time should not exceed 3-5 days, otherwise there is a risk of local infection, and if there is still a need for long-term infusion, it may be necessary to replace the other vessels and re-install them. If, after the indwelling needle is buried, there are obvious symptoms of irritation during the infusion process, such as severe pain, or if there is sudden infusion dysplasia, or even if the infusion cannot be performed normally, and thrombosis is suspected, the indwelling needle should be removed immediately. In addition, if the indwelling needle slips out of place and bulges around it, it also needs to be replaced in time. Therefore, the exact timing of needle replacement in children varies from person to person. Care should be taken to protect the indwelling needle during placement to avoid bending or breaking of the indwelling needle. In addition, care should be taken to keep the area around the indwelling puncture site clean and dry to avoid infection.