Pneumaturia

The passage of gas or air in the urine, usually manifesting as bubbles during micturition. Typically indicating an abnormal communication between the urinary tract and bowel (due to diverticulitis, Crohn's disease, malignancy), gas-forming urinary tract infection (emphysematous cystitis), scuba diving, or iatrogenic (surgery, use of a urinary catheter, bladder instrumentation).