Bladder cancer is a relatively common malignant tumor of the urinary system, with over 70% of bladder cancers presenting with hematuria in the early stages. However, about 10% of bladder cancer patients do not exhibit hematuria. For instance, when the bladder cancer is infiltrative, it is less likely to bleed, and when bleeding does occur, it is usually in the advanced stages. Frequent urination, painful urination, blood in urine, and cloudy urine can all be early signs of bladder issues. If someone experiences these symptoms, it is crucial to go to the hospital for relevant examinations early to detect bladder cancer at an early stage. Additionally, it is advisable not to hold in urine, to smoke less or quit smoking, and to drink more water to reduce the incidence of bladder cancer.