The causes of high phosphorus are generally too much phosphorus intake, increased phosphorus production or decreased phosphorus excretion. Normal blood phosphorus value is 0.74~1.39mmol/L, higher than the normal value is high blood phosphorus level. 1. Excessive phosphorus intake: Phosphorus intake mainly comes from daily diet, if the patient usually eat too much phosphorus-rich foods may lead to an increase in blood phosphorus levels, such as eating seafood, milk tea, coffee, mushrooms and other foods. 2. Increased phosphorus production: human cells contain phosphorus, if the patient himself has leukemia, lymphoma or metabolic acidosis and other diseases that destroy the body cells, the phosphorus in the cells is released into the blood, which will make the phosphorus high. 3. Reduced phosphorus excretion: phosphorus in the human body is mainly excreted through the kidneys, if the patient patients with renal diseases, such as glomerulonephritis, nephrotic syndrome, etc., resulting in reduced phosphorus excretion, phosphorus in the body will also be elevated. Normal people’s blood phosphorus and blood calcium levels have a certain correlation, when the blood phosphorus level rises the blood calcium level will decrease, resulting in convulsions, osteoporosis, panic and shortness of breath and other symptoms. For patients with high blood phosphorus, it is important to control the diet, reduce the intake of phosphorus, and at the same time promote the excretion of phosphorus, so that the phosphorus can be restored to the normal level as soon as possible under the guidance of the doctor, in order to avoid accidents.