Final answer:
Dehydration is a serious complication of vomiting, which occurs when there is an inadequate replacement of water loss from the body. It can lead to various signs and symptoms, including thirst, dizziness, and even loss of consciousness or death in extreme cases.
Step-by-step explanation:
A serious complication of vomiting is dehydration. Vomiting can lead to a significant loss of fluids from the body, which can result in dehydration if adequate fluids are not consumed. Dehydration occurs when there is an inadequate replacement of water loss from the body. Signs and symptoms of dehydration include thirst, dizziness, fainting, headaches, low blood pressure, fatigue, low to no urine output, and, in extreme cases, loss of consciousness and death.