There are several possible abnormalities in the urine routine of patients with nephritis: i. Positive urine protein, which is the most common abnormality in nephritis, depending on the disease protein can range from 1-4 plus; however, some patients with nephritis can be negative for protein in the urine routine, but the 24h urine protein quantification is very large and is caused by special types of protein leakage, such as multiple myeloma. Second, abnormal occult blood or microscopic red blood cells, which usually requires more than 3 red blood cells per high magnification field of view, mostly seen in IgA nephropathy, etc. Third, various tubular patterns, such as granular tubular, erythrocyte tubular, fat tubular, etc., are mostly seen in renal tubular injury or more serious glomerular disease. Fourth, the decrease in urine specific gravity is caused by the decrease in renal tubular reabsorption function, which is mostly seen in drug-related kidney injury and hypertensive nephropathy. Other abnormalities that may occur are elevated urinary glucose and changes in urinary pH.