The probability of bladder cancer metastasis is about 20%-30%, but the metastasis probability of tumors with different degrees of malignancy is not the same, and the higher the degree of malignancy the higher the metastasis probability of tumors or the later the discovery of tumors the higher the metastasis probability of tumors. Therefore, once the patient discovers that there are tumors in the bladder, he needs to carry out the related treatment as soon as possible, such as surgical treatment or cystocele instillation chemotherapy, etc., and take related treatment measures to reduce the probability of recurrence or metastasis. Therefore, once patients find the tumor in the bladder, they need to undergo relevant treatments as early as possible, such as surgical treatment or bladder chemotherapy, etc. to take relevant treatment measures and reduce the probability of recurrence or metastasis. In the early stage of bladder cancer, patients do not have any conscious symptoms, and in the late stage, painless hematuria may appear, which is only reddish in color and not accompanied by other discomforts, but pain may appear when the tumor volume gradually increases. If pain occurs, it often suggests that the tumor may have invaded the muscle layer of the bladder. At this time, it is necessary to go to the hospital immediately for treatment, through cystoscopy or CT of the urinary system to clarify the location of the tumor, and obtain a specimen of the tumor tissue to determine the nature of the tumor. Surgery and postoperative chemotherapy with bladder irrigation should be used as soon as possible to reduce the chance of metastasis or recurrence.