A little blood in the urine often indicates the presence of a bleeding disorder of the urinary system, and blood in the urine is not uncommon in clinical practice. Blood in the urine, if accompanied by difficulty urinating, often suggests that there may be prostatic hyperplasia and other diseases, and if there is blood in the urine with a history of obvious trauma, often indicates the presence of kidney injury or other urinary tract injuries. For patients undergoing long-term radiotherapy or chemotherapy, the presence of blood in the urine often suggests the presence of radiation cystitis or hemorrhagic cystitis. In addition, if the whole painless hematuria, often suggests that there may be urological tumors, such as common kidney tumors, ureteral tumors, bladder tumors, etc., the patient usually need to go to the urology department, through the relevant auxiliary examination, to clarify the specific causes.