Watercress-like swelling of the bladder can be considered as bladder polyps, bladder cancer or warts and other disease manifestations. 1. Bladder polyp: when the mucosa in the bladder is repeatedly and chronically stimulated by inflammation, bladder polyp can be formed by hyperplasia, which may cause poor urination, pressure symptoms or blood in urine. 2. Bladder cancer: physical and chemical stimulation, heredity and other factors can cause bladder cancer, after the occurrence of the most common hematuria, such as the occurrence of papillary carcinoma, cystoscopy can be seen in light red with velvety branches or long and thin tumors. 3. Condyloma acuminatum: unclean sex may be infected with human papilloma virus, when the virus infects the urethra and bladder, it can gradually form corns or papillae in the urethra and bladder, which may cause symptoms such as dysuria and painful urination. When you find a swelling in the bladder, you need to clarify the nature of the swelling in time for targeted treatment.