: Motion sickness from travel, unpleasant odors, and extreme heat or humidity can trigger the brain's vomiting center.
Nausea is the distressing, subjective sensation of needing to vomit. It is not a disease itself but a powerful protective mechanism designed to warn the body against toxic ingestion or internal dysfunction. Common Triggers and Causes Nausea
The sensation is coordinated by the in the medulla oblongata of the brain. It receives signals through several pathways: Nausea: a review of pathophysiology and therapeutics - PMC : Motion sickness from travel, unpleasant odors, and