It is recommended to go to the hospital for further examination to clarify the possible causes: 1. Bladder tumors can appear as hard bumps on the bladder, and if the tumor invades the pelvic wall or invades the muscles, it can cause local pain, accompanied by symptoms of hematuria in the naked eye. 2. lesions outside the bladder such as muscle hematomas or subcutaneous lesions such as lipomas, which can be felt as hard bumps when touched, but are not accompanied by abnormal urination and do not show symptoms of urinary frequency, urinary urgency or visual hematuria, it is recommended that a CT examination of the bladder area be performed to determine if the lesions are outside the bladder. 3. lesions of the skin in the bladder area such as epidermolysis bullosa or sebaceous gland Cysts, etc., need to be clarified after examination and, if necessary, by a dermatological consultation.