Women urine test protein one (+), then the possible causes: first, infectious proteinuria, when the occurrence of urinary tract infection, can appear protein for positive results. At this time qualitative often less than two (+) or less, quantitative often less than 1 gram or less, and with associated urinary tract irritation symptoms. Except for the case of one (+) protein in the urine routine, it can also be accompanied by the case of (+) white blood cells, which requires anti-infection treatment, and the protein can disappear. Second, occasional proteinuria, also known as pseudoproteinuria. When the urine is mixed with a large amount of blood pus or mucus components, it is possible to cause a (+) protein qualitative test, but the 24hUP quantitative examination is normal, and generally no special treatment is needed. Thirdly, spillover proteinuria, if it happens to have trauma such as crush injury of tissues or history of large trauma, can cause protein to have too much in the blood and exceed the absorption capacity of the renal tubules. This will then result in positive protein in the urine. Fourth, kidney disease and resulting in destruction of the glomerular filtration membrane, or renal tubular reabsorption dysfunction, which can then result in increased protein leakage. This situation often appears a large amount of proteinuria, for review, is a progressive increase in protein content, for 24h urine protein quantification greater than 3.5 grams or more, further kidney function tests are required, and if necessary, kidney puncture biopsy to determine.