The necessity to throw up could also be set off by quite a lot of issues, together with meals allergic reactions, being pregnant, migraines, sure medicines, the abdomen flu, and extra (through Penn Drugs). Whereas sure warning indicators, like gagging, could make sense, the connection between sweating and vomiting could seem rather less apparent.
As you start to vomit, the physique will increase saliva manufacturing within the mouth (through BBC Science Focus). This serves as a protecting coating in your mouth and tooth in opposition to impending abdomen acid publicity. The physique then triggers you to inhale deeply to forestall vomit from coming into the lungs. Your diaphragm then creates strain within the abdomen by way of a sequence of brief, sharp contractions, which additionally prompts dry heaving. The physique then seals off the entryway to the lungs as your abdomen muscle contract and the exit on the backside of the abdomen closes shut.
The final step is the place the sweating is available in. As your sympathetic nervous system prompts, your coronary heart charge will increase and the physique releases sweat to then cool itself down.