Patient's question:
NoDoctor's answer:
It is essential to fast before a kidney function test and not to drink water, as eating can affect blood sugar levels. Additionally, after a meal (especially a full one), the contents of the gastrointestinal tract increase, causing varying degrees of compression on organs, including the kidneys. This makes it difficult to clearly display the edges of the organs, leading to missed information. As a result, the test results may be confused with the actual condition, so it is generally recommended to do the kidney function test in the morning.