Occult blood in urine test suggests that there is bleeding in the urine. Clinical diseases that cause bleeding in the urine are as follows: 1) Infectious diseases, which can be seen in cystitis, pyelonephritis, urethritis, etc. 2) Malignant tumors, such as renal cancer invading the calyces of the kidneys and the renal pelvis, bladder migratory cell carcinoma, pelvic tumors invading the bladder, and cervical cancer invading the urethra. 3) Urological stones, such as bladder stones, urethra stones, and after the treatment of external lithotripsy. 4) Traumatic injuries of urinary system, such as mild contusion of the kidney. After treatment.4. Trauma to the urinary system, such as mild contusion of the kidney.5. Glandular cystitis, urethral caruncle, benign prostatic hyperplasia and so on can have occult blood in urine.6. Internal diseases, such as hematological diseases, coagulation disorders, hemolysis, and renal diseases caused by various reasons can have positive occult blood in the urine.7. The cause of some patients is unknown, and there is no other positive indication in CT, ultrasound and urinalysis, so they should be Regular review and dynamic observation.