Holding your urine too often or for too long is a bad habit that promotes urinary tract infections, weakens bladder muscles (causing leakage or difficulty urinating), and increases the risk of stones.

noli's read

The claim that chronically holding your urine increases the risk of urinary tract infections is solidly supported by research. For example, a cross-sectional observational study published in BMC Infectious Diseases confirms that a habitual delay in going to the bathroom is a major behavioral risk factor in women. Mechanically, urologists at Keck Medicine of USC note that urinating regularly helps naturally flush out bacteria before they can multiply. Regarding bladder weakening, the clinical consensus shared by the National University Hospital indicates that frequently holding urine for long periods excessively stretches its muscles, which can eventually cause leakage or make complete emptying difficult. Furthermore, the prolonged accumulation of urine promotes mineral sedimentation and the formation of small stones, as experts at Liv Hospital highlight. Nevertheless, it should be qualified that holding it in from time to time remains completely harmless for a healthy person, and this practice is even sometimes used in a controlled manner in therapy to retrain an overactive bladder.

the sources

No named source held this one up — that absence is part of the verdict.