What should I do if my serum phosphorus is high?

Patient's question:

Unsteady gait Does not speak

Doctor's answer:

Common causes of high serum phosphorus:
1. Decreased renal excretory capacity.
- Reduced glomerular filtration rate, such as in acute or chronic renal failure.
- Increased renal tubular reabsorption, such as in hypothyroidism or use of growth hormone.
- Excessive phosphate intake, such as from phosphate medication or the use of phosphate-containing laxatives and enemas.
- Excessive intracellular phosphate release: