Drinking water can affect the accuracy of the urine protein test. Clinical advice to retain urine routine, generally recommended to retain morning urine, that is, urine retained in the bladder for more than four hours of urine is more accurate, the amount of urine protein is generally (+) to (++++), can be qualitative detection, such as the need for further quantitative testing, you can line 24 hours of quantitative urine protein. Drinking water will make the urine is diluted, affecting the qualitative detection of how much, but will not affect the quantitative detection. The most common clinical diseases with urinary protein are glomerulonephritis, nephrotic syndrome, diabetic nephropathy, hypertensive renal damage and so on. It is recommended to actively find the cause of the disease, if necessary, can be performed renal puncture biopsy to clarify its pathological type, to guide the next step in the treatment.