3. Thirst
With this constant urination, a patient will be expelling large amounts of fluid from their system. In turn, this then means that they are likely to find themselves very dehydrated and that can lead to feelings of thirst as they keep needing to drink and to replenish their fluids.
The result is that they might find themselves constantly drinking water and this in turn can become disruptive if it causes them to wake in the night, or if it causes a dry mouth or throat.