High inorganic phosphorus means that the concentration of inorganic phosphorus in the serum is out of the normal range, which may be caused by abnormal thyroid function, excessive intake of vitamin D, renal failure and so on. 1. Abnormal thyroid function: It can be seen in primary hypoparathyroidism and secondary hypoparathyroidism-induced diseases. When parathyroid function decreases, calcium ion concentration decreases and inorganic phosphorus concentration increases. 2. Excessive intake of vitamin D: For example, excessive intake of vitamin D promotes intestinal absorption of calcium and phosphorus, which leads to an increase in blood phosphorus and inorganic phosphorus. Acute hepatic necrosis and multiple myeloma, the healing phase of bone fracture, etc. will also have high serum inorganic phosphorus. 3. Renal failure: Impaired excretion of inorganic phosphorus is common in all types of acute renal failure and chronic renal failure. Regardless of the type of renal failure, inorganic phosphorus excretion will be reduced and serum inorganic phosphorus concentration will be increased. When patients are diagnosed with high inorganic phosphorus, they should actively cooperate with doctors to conduct relevant examinations and cooperate with doctors for proper treatment.