Why do you feel urge to pass out urine?

It could be something simple like drinking too much water, but a consistent feeling of having to urinate all the time could be a symptom of a larger issue as well.

The first one that springs to mind is overactive bladder, but it could also be temporary, related to stress or Allergies or many other things. Please see the related link for more information. Also, if your symptoms are extreme or continuing, please see your doctor.