The body usually has low blood potassium in alkalosis, which is directly related to the body’s ability to adjust itself. Usually alkalosis refers to metabolic alkalosis. When the body develops metabolic alkalosis, the extracellular hydrogen ions will be relatively reduced, and at this time the patient’s PH will increase, which will cause the hydrogen ions inside the cell to flow outward and the extracellular potassium ions to flow inward due to the exchange of hydrogen ions and potassium ions, resulting in a decrease in the blood potassium concentration and causing hypokalemia. In patients with alkalosis, if hypokalemia occurs, hypokalemia is usually corrected by not giving potassium ion supplementation, but by treating the primary cause, which is the cause of alkalosis, such as nausea, vomiting, intestinal obstruction, and other primary causes.