Which type of incontinence is caused by bladder overdistention leading to leakage?

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Overflow incontinence occurs when the bladder becomes overdistended because it can’t empty properly, either from weak detrusor contractions or a bladder outlet obstruction. As urine keeps accumulating, pressure builds and the bladder leaks urine even without a distinct urge to void. This results in ongoing leakage or a dribble as the bladder remains chronically full, often with a high residual volume after attempted voiding. This distinguishes it from urge incontinence (leakage with a sudden, strong urge due to detrusor overactivity) and stress incontinence (leakage with increased intra-abdominal pressure from pelvic floor weakness). Functional incontinence is due to external factors like mobility or cognitive issues, not the bladder’s ability to store urine. So leakage from an overdistended bladder best fits overflow incontinence.