The usual causes are  hernias or dialysate leaks from catheter tracts ( the latter is the cause of labial edema). Scrotal edema is far more common than labial edema and will be discussed here. Clinical manifestations include scrotal swelling (usually bilateral), with about a third of patients also manifesting penile edema. Weight gain, palpable hernia, poor dialysate outflow, and peripheral edema occur in about half of cases.