The urge to urinate on hearing the sound of water may be related to physiological causes such as mental tension; and pathological causes such as bladder stones, overactive bladder syndrome, bladder tuberculosis and so on. 1. Physiological reasons: If you have recently been nervous or stressed, you may have the urge to urinate when you hear the sound of water. 2. Pathologic causes (1) Bladder stones: If you have bladder stones, the relative capacity of the bladder will become smaller, and the bladder will not store much urine, so you may feel the urge to urinate when you hear the sound of water. (2) Overactive bladder syndrome: If the bladder is in hypersensitive or overactive condition, it will lead to abnormal contraction of the urethral muscle, which may result in the urge to urinate when hearing the sound of water. (3) Bladder tuberculosis: If there is bladder tuberculosis, it can lead to toxic substances damaging the bladder mucosa, resulting in such phenomena. As you can see, it is normal to have the urge to urinate when you hear the sound of water flowing, but if the symptoms are serious or other symptoms such as low-grade fever, night sweats, frequent urination, urinary urgency, etc., it is recommended to consult a doctor to find out the cause of the disease in time, and under the guidance of the doctor to carry out the treatment.