Normal fresh urine is transparent, and it will become turbid soon after discharge, mainly due to salt crystallization or bacterial growth and reproduction.

Fresh urine turbidity can be seen in the following situations:

1. Uric acid precipitation: after concentrated acidic urine is cooled, there may be reddish uric acid precipitation, which can be dissolved by heating or adding alkali. This kind of situation is more common in cold weather.

2. Phosphate and carbonate precipitation: If the urine is alkaline, phosphate or carbonate may precipitate and be white, which can be dissolved by adding acid, and carbonate may generate bubbles when it meets acid.

3, urinary tract infection: mainly related to urinary tract bacterial reproduction, pyuria, leukocytosis, and milky urine.

4, chyluria: white chyluria, seen in lymphatic obstruction around the kidney caused by filariasis or other reasons. This is easy to recognize with the naked eye.

In this case, the first two are generally not lesions. If uric acid, phosphate and other crystals often appear in fresh urine, accompanied by more red blood cells, the possibility of urinary calculi should be suspected.

Urinary turbidity occurs during urinary tract infection, and pus cells or white blood cells can be found by microscopic examination of urine sediment. In patients with nephritis with urinary protein, fresh urine is generally not turbid.

Urine turbidity, urine routine examination should be done to make a clear diagnosis.