human
What are the main causes of a hangover?
assistant
The main causes of a hangover are dehydration, alcohol consumption, and lack of sleep. Dehydration can cause headaches, fatigue, dizziness, nausea, vomiting, and dry mouth. Alcohol consumption can lead to an increase in blood alcohol concentration (BAC), which can cause confusion, slurred speech, memory loss, difficulty walking, and poor coordination. Lack of sleep can also contribute to a hangover by causing fatigue, irritability, and depression.