Is it normal for urine to be placed for one night with white precipitate?

Urine is a form of metabolic waste eliminated by the human body. There are many inorganic salts, proteins and exfoliated epithelial cells in urine. Under normal circumstances, urine is yellowish and transparent liquid. If urine is discharged from the body, it will show bacterial contamination after standing for a period of time. In this case, proteins and salts will crystallize out, thus forming white precipitate. In this case, a urine routine test may be performed to see if there is a definite change in urine composition, but when taking a urine routine sample, fresh midstream urine should be taken for examination and culture. In general, excessive intake of protein or high-fat diet and semi-synthetic meat products can show white precipitation in urine. However, it is also necessary to combine specific clinical symptoms, such as frequent urination, urinary pain, and urinary insufficiency to comprehensively judge whether it is necessary to check urine routine. If there is no obvious infection symptoms or other causes, you can drink more water and urinate frequently to effectively prevent the formation of diseases, such as urinary stones.