What is vomiting?

Vomiting, also known as emesis or throwing up, is the involuntary, forcible expulsion of the contents of the stomach through the mouth. It is a natural reflex that helps protect the body from harmful substances, such as toxins, bacteria, and viruses. Vomiting can also be caused by a variety of medical conditions, including gastrointestinal infections, motion sickness, and pregnancy.

The process of vomiting begins when the stomach contracts and pushes its contents up the esophagus. The epiglottis, a flap of tissue at the back of the throat, closes to prevent food or liquid from entering the lungs. The abdominal muscles then contract, increasing pressure in the abdomen and forcing the stomach contents out through the mouth.

Vomiting can be a very unpleasant experience, but it is usually not a cause for concern. However, if vomiting persists for more than 24 hours or is accompanied by other symptoms, such as abdominal pain, fever, or diarrhea, it is important to see a doctor.