Cloudy Urine: Causes and When to See a Doctor - Urology

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The urine is cloudy and whitish?


Hello doctor, I have a habit of not flushing the toilet immediately after urinating at home (since that bathroom is only used by me), and I wait until I have urinated a few times before flushing.
I have noticed that when urine is left in the toilet for a while, it appears yellowish and cloudy.
Is this normal urine? Freshly passed urine does not appear yellowish and cloudy, but urine that has been left for a while does.
Should a woman consult a gynecologist or a urologist regarding urine issues? I initially thought the cloudy urine was caused by medications such as antidepressants, cholesterol-lowering drugs, or vitamins, so I didn't pay much attention to it.
However, I have recently been experiencing pain in my left flank and I'm not sure why.
The cloudy urine has been present for several months, while the left flank pain is more recent.
Thank you.

Nín hǎo, 30~39 year old female. Ask Date: 2017/02/22

Dr. Du Shixi reply Urology


Hello: If left for too long, it may change.
Both urology and gynecology can perform urine tests.
Since you have left flank pain, it is recommended to see a urologist for an examination.
Thank you for your inquiry.

Reply Date: 2017/02/22

More Info


Cloudy urine can be a concerning symptom, and understanding its causes is crucial for determining when to seek medical attention. When urine is fresh, it typically appears clear or light yellow. However, if urine is left standing for a while, it may become cloudy or develop a different color due to various factors, including the presence of bacteria, cells, or crystals that can settle in the urine over time.
The cloudiness you observe in your urine after it has been sitting in the toilet could be due to several benign reasons, such as the evaporation of water, which can concentrate the remaining substances in the urine, leading to a more opaque appearance. Additionally, urine can become cloudy due to the presence of phosphates, which can precipitate out of solution when urine is left to stand. This is often harmless and can happen with normal urine.

However, persistent cloudy urine, especially if accompanied by other symptoms such as pain, can indicate underlying health issues. In your case, the left-sided flank pain you mentioned, combined with the cloudy urine, warrants further investigation. Possible causes of cloudy urine include urinary tract infections (UTIs), kidney stones, or other renal issues. UTIs are particularly common and can cause symptoms such as cloudy urine, a strong odor, and discomfort during urination. Kidney stones can also lead to pain and changes in urine appearance.

Regarding your medications, certain drugs, including some antidepressants and cholesterol-lowering medications, can affect urine color and clarity. However, it is essential to consider the overall clinical picture, including your symptoms and medical history.

As for your question about which specialist to consult, both gynecologists and urologists can address urinary issues, but a urologist specializes specifically in urinary tract disorders and would be more appropriate for your symptoms, especially given the flank pain and cloudy urine. A gynecologist may be more focused on reproductive health, but they can also help with urinary symptoms related to female anatomy.

In summary, while cloudy urine can sometimes be benign, the persistence of this symptom, especially in conjunction with left-sided flank pain, suggests that you should seek medical evaluation. A urologist can perform tests, such as urinalysis and imaging studies, to determine the underlying cause of your symptoms and recommend appropriate treatment. It is always better to err on the side of caution when it comes to health concerns, especially when they involve changes in urine characteristics and accompanying pain.

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