Bladder irrigation once a week can not be postponed without special circumstances. Bladder irrigation is an adjuvant treatment for bladder cancer and can also prevent tumor recurrence. After surgery, chemotherapy drugs need to be infused into the bladder through a urethral catheter. These drugs, when infused into the bladder through the catheter, will create inflammation in the bladder and kill the cancer cells through the inflammation. Clinically, patients can be categorized as having low-risk, intermediate-risk, or high-risk disease based on how much risk they have for recurrence, and the approach to bladder instillation chemotherapy varies for patients with different risk levels. In theory, bladder instillation is performed once a week, and the results may be better with prolonged adherence. Patients who are generally not in severe pain or have bladder perforation should not delay the instillation to avoid unsatisfactory results. When performing bladder irrigation, it is necessary to adjust the position of the body in order to allow the chemotherapy drugs to fully contact the bladder tissue. If there is an emergency that prevents irrigation, it is necessary to explain to the physician in time and determine the time of the next irrigation to avoid physical changes. If the patient is not feeling well, he or she should consult a doctor for examination and early treatment.