Hi,
High or low amorphous phosphate levels in urine can happen due to various reasons in urine. White urine could be because of concentrated urine or any infection. Only amorphous phosphate levels will not help in diagnosis. Your child needs a detailed clinical examination, review of investigation and more tests to rule out any urinary tract problems. Kindly visit a pediatrician/urologist to be guided better.
Hope this helps!
Next Steps
Visit a Pediatrician
Health Tips
Do not panic and self interpret lab reports, let the doctor do his/her part.