The 24-hour urine potassium, sodium, chloride, calcium, magnesium, phosphorus and magnesium can determine the electrolyte changes in the body, and according to the electrolyte changes to guide the clinical use of medication and to assist the doctor in determining the related diseases, such as: primary aldosteronism, hyperparathyroidism, acidosis and so on. 1. Urinary potassium: the normal reference value is 25~125mmol/24h. In primary aldosteronism, aldosterone preserves sodium and excretes potassium, so that the blood potassium decreases and the urinary potassium increases. The use of diuretics increases glomerular excretion of sodium and potassium, resulting in elevated urinary potassium. When potassium-preserving diuretics are used, aldosterone action is inhibited, renal tubular recycling of potassium increases, and urinary potassium decreases. 2. Urinary sodium: the normal value is 130~270mmol/24h, when the adrenal cortex function is low and the renal tubular function is damaged, the ability of the kidney to recycle sodium decreases, and the urinary sodium increases. In primary aldosteronism, aldosterone protects sodium and excretes potassium, and urinary sodium decreases. 3. Urine chlorine: normal value 170~255mmol/24h, the decrease of urine chlorine may be caused by long-term low-salt diet, renal tubular acidosis, hypotonic dehydration, and the increase of urine chlorine may be caused by the recent taking of chlorine-containing salt drugs. 4. urine calcium, phosphorus, magnesium: urine calcium 2.5~7.5mmol/24h, urine phosphorus 22~48mmol/24h, urine magnesium 2.1~8.2mmol/24h. parathyroid hormone in hyperparathyroidism reduces osteogenesis, increases osteoblastic activity, increases blood calcium, promotes the excretion of phosphorus and magnesium by the kidney, and leads to high urinary calcium, high urinary phosphorus and high urinary magnesium. If there is any abnormality, consult a doctor promptly and follow the doctor’s instructions for treatment.