The presence of a lump in the bladder is considered to be a high possibility of bladder tumor, and generally most bladder tumors are malignant, i.e. bladder cancer. Bladder tumor is a common tumor in urinary system, 90% of which are uroepithelial carcinoma, and a few are squamous carcinoma and adenocarcinoma. It can be manifested as hematuria, urinary frequency, urgency, urinary pain and abdominal mass. Perfect urinary ultrasound or CT can find bladder mass. Cystoscopy can also be perfected to directly observe the size, number, location and shape of the tumor, and biopsy can be taken to confirm the diagnosis. There are more causes of bladder cancer, smoking is the most important cancer-causing factor, in addition, long-term exposure to industrial chemical products, such as leather, plastics, paint, etc., will also increase the risk of bladder tumor. Long-term bladder stones and indwelling catheters significantly increase bladder irritation and the risk of bladder tumors. If you find a bladder mass, it is recommended that you seek prompt medical attention for a definitive diagnosis and standardized treatment.