Many diseases have its specific symptoms that can help the patient to find out the problem in their own or body. Bladder cancer is no different. The most obvious symptom of bladder cancer is hematuria, and of course, some symptoms of tissue invasion and distant metastasis due to the fact that bladder cancer can also present infiltrative growth and distant metastasis. The most common symptom of bladder cancer is blood in urine. In most cases, blood in urine is more serious, and sometimes it can be detected by naked eyes without urine examination. Of course, hematuria can occur in many diseases of the urinary system, such as urinary stones and urinary tract infections, but hematuria in bladder cancer is usually not accompanied by painful symptoms. The problem of hematuria in bladder cancer is described by doctors with a short term – painless hematuria of the naked eye. This problem occurs mainly due to the invasion of the bladder mucosa by the cancerous tissue, which causes the rupture of the submucosal blood vessels causing bleeding mixed into the urine. In exceptional cases, it is difficult to pass urine due to blockage of urine drainage by formation of blood clots. During the attack of bladder cancer, the human tissue has the function of self-repair. Therefore, after the damaged mucous membrane is covered by other tissues, the hematuria will suddenly stop. Many people will think that their disease is cured, but in fact, it is not cured, and the problem of hematuria may occur again later. This is the recurrent symptom of hematuria. During the development of bladder cancer, the location invaded by the cancerous tissue will have an inflammatory reaction. The symptoms of urinary tract irritation are formed, which are manifested as an increase in the frequency of urination, a more urgent desire to urinate, and stinging pain in the urethra during urination. Bladder cancer can develop distant metastasis, metastasis to lung can cause coughing, coughing sputum, hemoptysis and other problems, metastasis to bone tissue can cause untraumatized fracture, bone pain and inability to move freely. The symptoms of metastasis in bladder cancer depend mainly on the location after metastasis. The most important warning symptom of bladder cancer is hematuria. After such a problem as blood in urine occurs, it is important to go to hospital for examination in time to clarify the cause of occurrence. Avoid delaying the treatment of the disease.