Pain in the arm when hanging saline is usually caused by the irritation of the drug on the blood vessels, or the prolonged time of the static point, or the pain in the arm caused by the coldness of the drug, or the pain caused by the irritation of the blood vessels by the drug solution. Some antibiotics, such as cephalosporins or quinolones, the drug itself will easily cause irritation to the blood vessels, we can observe the local reddening of the blood vessels after the static point, then it means that the drug stimulation is relatively large. We need to slow down the speed when ordering to reduce the high concentration of drugs on the blood vessels, which can improve the pain. If the pain in the arm on the side of the resting point or the irritation of the blood vessel is caused by repeated resting points and long resting time, then you can discuss with the nurse if you can change the arm or use another blood vessel for resting point. If the medication has just been taken out of the refrigerator, the medication itself may be too cold and cause irritation to the blood vessels or arm or arm during the infusion process, and this pain is triggered. Before the drug enters the blood vessel, we can use a bottle of warm water to heat the drug locally, or put a warm water bag under the arm on the side of the static point, then it will not be so cold when it enters the blood vessel and will reduce the irritation to the arm.