What causes stress urinary incontinence?

Coughing, sneezing, laughing, lifting, running, or changing position can briefly increase pressure inside the abdomen. If the pelvic floor muscles, connective tissues, or bladder outlet do not provide enough support, urine may escape. Vaginal childbirth can stretch or injure these supporting tissues, and pelvic floor dysfunction can affect both strength and coordination. Pregnancy, ageing, hormonal changes, repeated straining, constipation, chronic coughing, and higher body weight may add pressure or reduce support. These factors can occur together, so the cause is not always a single event.

Notice which movements trigger leakage, how often it happens, and whether you also feel urgency, burning, pain, or difficulty emptying your bladder. A clinician can assess your pelvic floor, review childbirth and surgical history, and check for other urinary problems. Pelvic floor exercises are often taught with attention to correct lifting and relaxing of the muscles; a pelvic health physiotherapist can help if the technique is unclear. Managing constipation, treating a persistent cough, and adjusting high-impact activity may reduce pressure while you seek advice.

Arrange an assessment for new, worsening, or bothersome leakage, especially if it limits exercise, intimacy, work, or sleep. Seek prompt medical care for blood in the urine, fever, flank pain, severe pelvic pain, inability to pass urine, or sudden loss of bladder control with leg weakness or numbness. Leakage with burning or strong urgency may point to a different urinary problem and needs its own evaluation.

Could my symptoms reflect pelvic floor weakness, poor muscle coordination, or another bladder condition? Would a pelvic examination, urine test, or bladder diary help clarify the cause? Which exercises or treatments suit my symptoms and medical history?