Potassium is an important electrolyte element that tends to irritate blood vessels during intravenous infusion of rehydration solutions containing potassium ions. This can be relieved by lowering the infusion rate, diluting the concentration of potassium preparations, and massaging hot compresses. 1. Reduce the infusion rate: the drip rate of infusion can be slowed down, so that the tingling sensation of blood vessels will be reduced. 2. Dilute the concentration of potassium preparation: before the formal infusion, special attention should be paid to the concentration ratio of potassium ions. If there is irritation of blood vessels during intravenous potassium supplementation, then the concentration of potassium ions can be diluted under the guidance of doctors by adding more saline or glucose solution. 3. Massage and hot compresses: local massage or hot compresses can be applied to the irritated area to reduce the irritation. In the process of treatment, patients should strictly follow the doctor’s arrangement, and pay attention to diet, eat more food with higher potassium content, such as bananas, etc., so as to promote the recovery of the disease.