The sound of water running can help with urination, which is actually an acquired conditioned reflex. Conditioned reflex is an advanced neural activity of living beings, and is not innate, but is a reflex that is formed later in life through training or learning. After the human body receives the auditory signal of the sound of water flowing, the signal will be transmitted along the nerves to the central nervous system of the brain, and then through the nerves to the bladder, which causes the sphincter muscle of the bladder to stretch, forming the reaction of urination. As people in the urine will make the sound of water flow, in the long run, the human brain has formed a conditioned reflex, so hearing the sound of water flow will trigger the desire to urinate, thus playing a role in helping to urinate. When you hear the sound of water flow urine uncontrollably discharged on their own, it is recommended to go to the hospital to receive a checkup, clear cause of the disease under the guidance of the doctor treatment.