Why does your mouth water up when you’re about to vomit?

The increase in saliva production or the sensation of “mouth watering” before vomiting is a physiological response associated with the body’s natural defense mechanisms and reflexes. Several factors contribute to this response:

  1. Protective Mechanism: Saliva helps protect the mouth, teeth, and throat from the acidic stomach contents that are about to be regurgitated during vomiting. It can act as a barrier to prevent the stomach acid from causing damage to the oral and throat tissues.
  2. Lubrication: Increased saliva provides lubrication, which can help facilitate the passage of vomit, making it easier for the contents of the stomach to move up and out of the body.
  3. Stress and Nausea: In some cases, the body’s response to stress, anxiety, or the anticipation of nausea can trigger the production of extra saliva. This can be part of the “fight or flight” response, where the body prepares for a potential threat or challenge.
  4. Digestive Enzymes: Saliva also contains digestive enzymes, such as amylase, which continue to break down carbohydrates even in the presence of nausea or vomiting.

It’s important to note that while the increased salivation is a natural response, vomiting should not be considered a normal or desirable occurrence. Vomiting can be a sign of an underlying medical condition or a protective response to something harmful in the stomach. If you frequently experience vomiting or excessive salivation, it’s advisable to consult a healthcare professional to determine the underlying cause and seek appropriate treatment or management.

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