Proteinuria occurs in urinary tract infections and is called infective proteinuria. It may be due to a decrease in protein reabsorption after infection or to the presence of more mucin in the urine of bacteria and their bacterial metabolites, which can gradually disappear after the infection is cured. In general, quantitative examination is usually less than 200mg/24h, and qualitative examination is usually less than (++), not because of abnormal kidney function, but because of impaired reabsorption or increased bacterial protein after infection, sometimes the infection may be combined with bleeding, and the destruction of red blood cells can also increase the protein content in urine. It is recommended to go to the hospital for active treatment, through the urine culture to clarify what bacteria, what drugs are effective for the infection, targeted antibiotics to choose for treatment, the infection is cured after the urine protein can be restored to normal, during the treatment is recommended to drink more water, more urination, and early use of an adequate amount of antibacterial to anti-infection treatment.