In prostatitis, the urge to urinate after drinking water is usually caused by inflammation of the prostate gland that irritates the bladder. The symptom of wanting to urinate after drinking water is often seen in patients with chronic prostate. As the prostate gland is infected with disease-causing microorganisms, which in turn cause irritation to the mucous membrane of the bladder neck, even edema and erosion of the mucous membrane may occur. As a result, the patient’s bladder neck will frequently and involuntarily contract, which leads to the symptom of frequent urination, which is especially obvious after the patient has drunk a lot of water, and thus there will be a situation in which the patient wants to urinate after drinking water. If the patient has the above symptoms, it is recommended to go to a professional urology department for consultation and treatment immediately.