The urge to urinate but no urinary distension may be a urinary tract infection, overactive bladder syndrome, etc., and should be promptly consulted to identify the cause of the disease. 1. Urinary tract infection: If there are a lot of white blood cells in the urine routine, then it is a case of urinary tract infection, which will lead to the phenomenon of having the urge to urinate but no feeling of urinary distension. 2. Overactive bladder: Overactive bladder can be caused by a variety of diseases, such as infections or tumors, stones, foreign bodies, etc., which can lead to the activation of bladder receptors, so that the patient always have the desire to urinate or the emergence of urinary urgency, urinary frequency, nocturia, and even including urge incontinence. In addition, there are many other reasons that can cause the phenomenon of having the desire to urinate but not the feeling of urinary distension. To summarize, if you have the urge to urinate but no urinary distension, consult a doctor to clarify the cause of the disease, and then give targeted treatment.