Why do you vomit when your hung over?

There are several factors that can contribute to vomiting during a hangover. Here are some of the key reasons:

1. Alcohol's Effect on the Stomach: Alcohol irritates the lining of the stomach, leading to inflammation and nausea. This can trigger the gag reflex and cause vomiting.

2. Dehydration: Alcohol acts as a diuretic, causing increased urine output and dehydration. Dehydration can result in an imbalance of electrolytes and essential minerals in the body, leading to nausea and vomiting.

3. Acetaldehyde Buildup: When alcohol is metabolized in the body, it breaks down into a toxic substance called acetaldehyde. This compound can irritate the stomach and cause nausea, ultimately leading to vomiting.

4. Congeners: Congeners are impurities found in alcoholic beverages, particularly in darker liquors like whiskey, brandy, and red wine. These substances can contribute to the intensity of a hangover and increase the risk of vomiting.

5. Stomach Acid Reflux: Alcohol relaxes the muscles of the esophagus, allowing stomach acid to reflux into the esophagus. This can cause heartburn, nausea, and vomiting.

6. Inflammation: Alcohol consumption can trigger inflammation in the body, including in the digestive tract. This inflammation can further irritate the stomach and lead to vomiting.

It's important to note that not everyone experiences vomiting during a hangover, and the severity of symptoms can vary from person to person. Additionally, certain factors like individual tolerance to alcohol, genetic variations, and underlying medical conditions can influence the likelihood and intensity of hangover symptoms, including vomiting.