Stress incontinence is the most common type of incontinence and can affect both men as well as women. It is also the most common type of incontinence that affects younger women. Stress incontinence occurs when pelvic floor muscles that support the bladder and urethra, weaken and put pressure on the bladder and urethra to work harder. With stress incontinence, everyday actions that use the pelvic floor muscles, such as coughing, sneezing, or laughing, can cause you to leak urine. Sudden movements and physical activity can also cause you to leak urine.