What grows in the bladder may not always be cancer, but may also be bladder stones or benign bladder swelling, which should be consulted and treated in time. 1. Bladder cancer: when middle-aged people over 50 years old find a bladder mass, it is mostly malignant tumor, i.e. bladder cancer, whose main symptom is painless hematuria visible to the naked eye, and some patients may show urinary irritation symptoms of frequent urination, urinary urgency and painful urination. If the tumor is large, urinary tract obstruction can also occur. 2. Bladder stones: bladder stones are common in young and old men, the stones can be formed in the bladder, or the upper urinary tract stones can be discharged into the bladder with urine, which mainly manifests as urinary tract irritation, lower abdominal pain, and difficulty in urination. 3. Benign bladder mass: young patients around 30 years old, bladder growths, the possibility of benign, such as bladder urea epithelium of the inverted papilloma, generally more benign, surgical resection basically no longer recur. In summary, both young people and the elderly, once you find something growing in the bladder, you should go to the hospital in time.