The main treatment for low blood phosphorus is symptomatic phosphate supplementation. For patients with asymptomatic low blood phosphorus, oral phosphorus supplementation, such as 1.1 L of low-fat or skim milk, or oral sodium or potassium phosphate, can be given in doses of up to 3 g of phosphate per day; if the low blood phosphorus is more severe, less than 0.16 mmol/L, or if the primary disease is not easily treated with oral phosphorus, intravenous phosphorus supplementation can be used. If the patient’s renal function is normal, potassium phosphate can be given intravenously to treat, the common dose is 2mg/kg, intravenous drip for 6 hours, should not exceed 7mg/kg, and at the same time when supplementing phosphorus, should avoid hypocalcemia, hyperphosphatemia, ectopic calcification, hyperkalemia, etc. If patients with renal insufficiency generally use sodium phosphate and not potassium phosphate, because patients with renal failure often have a combination of hyperkalemia and patients with renal insufficiency usually develop hyperphosphatemia and do not need phosphorus supplementation.