Why my underwear is always wet and smells like urine? This could be due to factors like physical activity, stress, or wearing clothing made from non-breathable materials. Urinary incontinence: Involuntary urine leakage, known as urinary incontinence, can cause wetness in your underwear. This condition can be caused by various factors, including weakened pelvic floor muscles, … Continue reading Why is My Underwear Always Wet? Causes and Treatment