It is not difficult to prevent bladder tumor, and it is not difficult to say it. What do you mean? Because bladder cancer has a lot to do with living habits. The first patient, especially the smoker, must pay attention to quitting smoking after the operation. The earlier you quit smoking, the lower the probability of bladder tumor or recurrence, which is much better than that of patients who quit smoking late, so quit smoking early, which is from the perspective of living habits. Also, if patients who don't usually smoke are exposed to second-hand smoke in their living environment, they should try to avoid it. The second question is the type of work. There are some special occupations. According to epidemiological survey data, the incidence of bladder cancer is higher than other occupations. Therefore, it should be paid special attention to that some painters, dyers and patients engaged in the chemical industry, if they have bladder cancer, should try their best to avoid contact with such chemical raw materials, such as benzene and aromatic amines, in the future working environment. Mainly these two points.