The presence of occult blood in the urine routine indicates that there is at least 1 ml of blood per 100 ml of urine and can be seen for a variety of reasons. The most common is a urinary tract infection, especially acute cystitis. There may also be urinary stones, such as ureteral stones, especially when pain is evident and occult blood in the urine is more pronounced. The most common one in the elderly is urinary tract tumor, which is usually painless hematuria and can be manifested as whole hematuria, terminal hematuria, or starting hematuria, which can reflect different parts of the tumor. It may also be glomerulonephritis, which is generally positive for urinary occult blood and can be clarified by urinary aberrant red blood cell examination. If the aberration rate is greater than 80%, it reflects the glomerular origin and requires aggressive renal preservation therapy. If a renal puncture biopsy is performed to clarify the type of kidney pathology, IgA is likely, and oral administration of Jin Shui Bao and Bai Ling capsules can slow down the progression of the disease.