There are several precautions to take when preparing for surgery. One includes not eating or drinking anything the night before, but what’s the big deal?

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Doctors advise this in order to minimize the risk of aspiration pneumonia, which can be caused by vomiting.

When a patient vomits after going under the knife, the food or acidic contents can come back up an enter into the lungs. That could be catastrophic.

If a patient does happen to consume food, an anesthesiologist will remove anything in the stomach.

Take a look at Business Insider's video below for the full explanation.

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Fans celebrate in the stands after Cape Verde defeated Eswatini in a World Cup qualifying soccer match at Estádio Nacional in Praia, Cape Verde, Monday, Oct. 13, 2025, to clinch their qualification for the 2026 World Cup. (Cristiano Barbosa/AP)

Credit: AP