Ever wake up with an urgent need to urinate, even if you barely drank anything the night before? You're not alone—this is a normal physiological response.
At night, your kidneys produce less urine as the hormone vasopressin (also called antidiuretic hormone) prompts your body to retain more water and reduce filtration. Meanwhile, your bladder relaxes during sleep, allowing it to fill steadily with what little urine is made. By morning, it's full and ready to signal you.
Read also: 'Do you have to urinate more often because of alcohol?'
Starting your day with coffee? Caffeine is a diuretic, stimulating your kidneys to produce more urine and prompting that extra trip to the bathroom. The same applies to other caffeinated beverages.
