It is the forcible throwing of contents of stomach up through mouth as a result of involuntary spasms of the muscles of the stomach. It is also called emesis.
The chemoreceptor trigger zone as well as vomiting center of the medulla oblongata is involved in the emesis.
Following illustration is helpful in this context.
Vomiting may have from one of the following causes:
1. Motion sickness
2. Intestinal obstruction
3. Disease or disorder of the inner ear
4. Some kind of injury to the head
6. Adverse effects or direct effects of certain drugs
8. Renal failure
After effects of vomiting:
In severe cases vomiting may result in dehydration, malnutrition, or rupturing of the esophageal wall.
Its treatment is directly towards the cause or origin of vomiting. It is beneficial to drink a lot of clear water or any other fluids so that the chances of dehydration will not be there.
On the other hand, medicines can also be used.