A child aged 4 with red blood cells in their urine should be evaluated for potential kidney issues, as this could indicate the presence of hematuria. The specific treatment would depend on the type of red blood cells observed in the urine and the underlying cause.

腎病綜合症最具有代表性的四大症狀包括大量蛋白尿、低蛋白血癥、高膽固醇血癥、全身明顯水腫等。