When a stone enters the bladder, symptoms such as pain, changes in urination, and hematuria in the naked eye may occur. 1. Pain: When the stone enters the bladder blocking the entrance to the urethra or enters the urethra there will be pain, pain in the penis and testicles in men and pain in the lower abdomen in women. 2. Changes in urination: When the stone enters the bladder and blocks the entrance to the urethra or enters the urethra, there will be difficulty in urination or intermittent urination and frequent urination. 3. Hematuria: During urination, you will see red color of urine, which is also called hematuria. If the above symptoms occur, it is recommended to consult a doctor in time and treat it actively under the doctor’s guidance.