Why Do I Get a Sudden Wave of Nausea Whenever I Smell Cooked Onions?
1. Introduction A sudden wave of nausea triggered by the smell of cooked onions is a conditioned olfactory aversion or a manifestation of hyperosmia linked to gastrointestinal sensitization, migraine disorders, or hormonal shifts. The sulfur-rich volatile compounds released during the cooking process stimulate the olfactory bulb, which shares direct neurological pathways with the limbic system … Read more
