A pelvic organ prolapse occurs when a pelvic organ has descended from its normal position within the pelvis. A prolapse can occur for various reasons and cause symptoms such as pressure or pain in your abdominal/pelvic region, urinary incontinence or frequency, difficulty emptying bladder or bowel, and so forth. Some examples of why a prolapse may occur include aging, pelvic floor weakness or tightness, pregnancy or increased abdominal pressure from lifting and/or coughing repetitively.