Bladder irrigation for bladder tumor may bring side effects or sequelae, including: 1. urinary tract infection, because each bladder irrigation process requires indwelling catheter, and in the early stage of irrigation, the irrigation needs to be done once a week apart, so it may cause urinary tract infection and lead to urinary frequency, urinary urgency or painful urination, and often the infection lasts longer and is difficult to recover. 2. chemical cystitis. Cystitis, bladder tumor perfusion use chemotherapy drugs, chemotherapy drugs have certain irritation to bladder mucosa, long-term perfusion process will cause damage to bladder mucosa and cause painful urination, bladder pain or incomplete urination and other symptoms, after stopping perfusion this situation can gradually disappear or improve. 3, hematuria, after bladder perfusion, the urinary tract can appear in a short time mucosal erosion, bleeding. In this case, bleeding or blood clots can occur during urination.