Peripheral intravenous infusion refers to the introduction of large amounts of sterile fluids, electrolytes, and medications into the body from a vein using the principle of fluid pressure and atmospheric pressure. The main aspect of peripheral vein care is to prevent complications such as local bulging, bleeding, and infection. In terms of nursing care, it is recommended that the peripheral venous needle should be fixed first, and in the process of infusion, the patient should be instructed to avoid moving around, so as not to cause the needle to poke through the blood vessels, and localized bulging occurs. For retained peripheral intravenous infusion needles, it is recommended that they be sterilized once a day to help prevent medical infections.