Bladder cancer 0.63 cm is generally not serious, but the judgment of the severity of bladder cancer should also refer to many other factors, such as the type of tumor, the degree of infiltration, whether there is metastasis to the surrounding lymph nodes and distant organs, whether the treatment is timely and thorough, and so on. Bladder cancer is a malignant tumor disease originated from bladder, its cause is not yet clear, which may be caused by heredity, smoking, chemical stimulation and other factors. Patients may have painless hematuria, frequent urination, urgency and other symptoms. Once diagnosed, patients should actively take treatment measures, such as transurethral cystectomy of bladder tumors and radical cystectomy. Postoperatively, it can be combined with bladder instillation, such as BCG, epirubicin, piroxicam, etc. It can also be combined with radiotherapy and other treatment options. Bladder cancer of 0.63 cm is not huge purely in terms of tumor size, and if it can be detected early and treated in time, it can usually achieve good treatment results. Drugs should be applied under doctor’s guidance.