More than 95% of the causes of hematuria are due to diseases of the urinary tract itself, among which glomerular diseases (acute nephritis, acute nephritis, membranoproliferative nephritis, thylakoid proliferative nephritis, focal glomerulosclerosis, etc.), skin cysts, polycystic kidneys, stones (kidney, ureter, bladder, urethra stones), prostatic hyperplasia, urinary tract infectious diseases (tuberculosis, pyelonephritis, cystourethritis, prostatitis) and tumors (kidney, ureter, bladder, prostatitis) are the most common. and tumors (kidney, ureter, bladder, prostate tumors) are the most common, and there is also a category of renal vascular diseases that can cause hematuria. Other diseases such as coagulation abnormalities (idiopathic or pharmacologic thrombocytopenia, hemophilia, scurvy, etc.), systemic diseases (aplastic anemia, leukemia, systemic lupus erythematosus, dermatomyositis, leptospirosis, epidemic hemorrhagic fever, etc.) and diseases of adjacent organs can also cause hematuria. It is especially worth noting that there are clinical cases of hematuria for which no cause can be identified, so it is important to regularly review urine sediment, urine cytology analysis, renal ultrasound, cystoscopy, intravenous pyelogram, etc. and follow up until a clear diagnosis is made.