Why do you have a sour taste when vomit?

When you vomit, the contents of your stomach are expelled through your mouth. This includes stomach acid, which is a highly acidic liquid that helps to break down food. Stomach acid has a pH of between 1 and 3, which means that it is very acidic. When it comes into contact with your tongue and the inside of your mouth, it can cause a sour taste.

In addition to stomach acid, vomit can also contain other substances that can contribute to a sour taste, such as bile and food particles. Bile is a fluid that is produced by the liver and helps to digest fats. It is also very acidic and can contribute to a sour taste in vomit. Food particles can also contribute to a sour taste, especially if they are acidic foods, such as citrus fruits or tomatoes.

The sour taste of vomit is a natural reflex that helps to protect your body from harmful substances. It encourages you to spit out vomit and avoid swallowing it, which can help to prevent further irritation and damage to your digestive tract.