Excretion and Perception of a Characteristic Odor in Urine Asparagus Officinalis may cause a distinctive odor inside your pee-pee. It is commonly known that eating this green vegetable can result in a pungent aroma while visiting the restroom. If you see an unpleasant smell after enjoying a meal including asparagus, don't panic. It is simply a natural reaction that occurs internally. Be reassured that the odor poses no harm and will diminish gradually.