Peripheral venous indwelling needles should be changed every 72 to 96 hours. The indwelling needle can avoid the pain of repeated puncture and improve the efficiency of drug administration and resuscitation. However, the patient should not move the limb on the puncture side excessively after the needle is inserted to prevent the needle from moving and causing phlebitis or poor blood flow, which may lead to coagulation of blood at the tip of the needle and shorten the time of insertion. Avoid getting wet by water, wash your face or take a bath and wrap the area with plastic paper to prevent infection. Patients with malnutrition and low immunity should strengthen nutrition to enhance the body’s ability to repair the trauma to the vessel wall and anti-inflammatory ability to local inflammation. If found during infusion, such as redness at the eye of the needle, local oozing, the patient complains of itching and other discomforts immediately remove the indwelling needle.