Proteinuria: When to Recheck Your Kidney Health - Urology

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Regarding urinary protein?


Hello, doctor.
This year, during the second semester of my sophomore year, I was found to have protein in my urine when I entered high school (all other blood and urine tests were normal).
Recently, I went to the hospital for testing again (about a year after the last test), and the result was weakly positive (everything else was normal, and the doctor noted that I should just monitor it).
This has made me a bit worried because I sometimes experience back pain, although I'm not sure if it's related to my kidneys (I haven't felt it recently).
Should I get tested again now, or should I wait for the university entrance health check?

xuesheng, 10~19 year old female. Ask Date: 2016/03/02

Dr. Li Xinyi reply Urology


It is advisable to see a nephrologist for an examination.

Reply Date: 2016/03/02

More Info


Understanding proteinuria and its implications for kidney health is crucial, especially for young individuals like yourself who are navigating through health concerns. Proteinuria, or the presence of excess protein in the urine, can be an indicator of kidney dysfunction, but it is essential to interpret these results in the context of your overall health and any accompanying symptoms.

From your description, it seems that you had a positive proteinuria test during your high school entrance examination, which was followed by a weak positive result a year later. The fact that other tests, including blood tests and urinalysis, returned normal results is reassuring. It suggests that there may not be a significant underlying kidney issue at this time. However, the presence of protein in the urine, even at low levels, warrants monitoring.

The recommendation from your physician to "just follow up" is a common approach in cases of mild or transient proteinuria, especially if there are no other concerning symptoms or abnormal test results. It is important to note that proteinuria can be influenced by various factors, including dehydration, physical activity, fever, and even stress. Therefore, a single instance of proteinuria does not necessarily indicate chronic kidney disease.

Regarding your concern about back pain, it is essential to differentiate between musculoskeletal pain and potential kidney-related issues. If the pain is localized and associated with physical activity, it may be more related to muscle strain rather than kidney dysfunction. However, if you experience persistent or severe pain, or if it is accompanied by other symptoms such as changes in urination, swelling, or fatigue, it would be prudent to consult a healthcare professional for further evaluation.

As for rechecking your kidney health, it is advisable to follow your doctor's guidance. If you feel anxious about your kidney function or if you notice any new symptoms, it would be reasonable to request a follow-up test sooner rather than waiting for your university entrance examination. Regular monitoring can provide peace of mind and help catch any potential issues early.

In terms of lifestyle and dietary considerations, maintaining a balanced diet, staying hydrated, and avoiding excessive protein intake can support kidney health. If you are involved in sports or physical activities, ensure you are not overexerting yourself, as this can sometimes lead to transient proteinuria due to muscle breakdown.

In summary, while the presence of protein in your urine is something to keep an eye on, the context of your overall health, the absence of other concerning symptoms, and the normal results of other tests are encouraging. If you have any doubts or if your symptoms change, do not hesitate to seek further medical advice. Regular check-ups and open communication with your healthcare provider will be key in managing your kidney health effectively.

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