Firstly, it is not possible to determine the presence of bladder cancer in this way. If, after urinating, there is blood-tinged fluid when wiping the urinary opening with tissue, this may be considered hematuria. There are many causes of hematuria, such as urinary tract infections, or swelling, congestion, and erosion at the urinary opening, as well as kidney stones, all of which can lead to blood in the urine.

Of course, tumors in the urinary system can also cause blood in the urine, but tumor-induced hematuria is often painless, and the color of the blood tends to be concentrated, making the urine appear red or like washed meat water. In such cases, it is important to promptly visit a hospital for routine urinalysis, ultrasonography, and even CT scans or cystoscopy to determine if it is bladder cancer.