Nocturia

From drinking too much fluid at night is one. Another is taking medications that remove fluids from the body, particularly if taken at night.

Some medical conditions cause the body to produce an excessive amount of urine at night, increasing bathroom urges. These conditions include diabetes, thyroid disorders, heart disease, lung disease and vascular disease.

Sleep disorders are another common cause, though making a diagnosis can be tricky. Sometimes, people wake because they feel the urge to urinate. Others wake because their sleep habits are poor and then urinate simply because they are awake.