Grading of hematuria, according to the degree of hematuria is divided into microscopic hematuria and hematuria, microscopic hematuria is usually reddish wash water, bleeding can appear when more blood clots, generally 1mL of blood per 1L of urine can be presented with microscopic hematuria. Microscopic hematuria is generally normal urine appearance, centrifuged urine sediment per high magnification microscopic field of view more than three red blood cells for microscopic hematuria. According to the site of hematuria can be divided into initial hematuria, that is, the beginning of urination hematuria, seen in the urethra and bladder neck. Terminal hematuria is bleeding at the end of urination, suggesting that the lesion is in the bladder triangle. Total hematuria, that is, hematuria throughout the urination process, is seen in glomerular diseases and systemic diseases, as well as urinary stones, tumors, trauma, pyelonephritis, polycystic kidney, thrombocytopenic purpura, hemophilia, leukemia, as well as the use of some anticoagulant overdose, or sulfonamides and salicylic acid preparations can also be seen after hematuria.