Eggs are one of the most popular foods in the world. They’re affordable, nutritious, and incredibly versatile, making them a staple in many kitchens. But what happens if you accidentally eat an egg that’s spoiled?

Whether it’s a hard-boiled egg that has been sitting too long or a cracked egg that seemed fine at first glance, consuming a rotten egg can lead to unpleasant—and sometimes serious—health consequences.

Here’s what you need to know.

The Biggest Risk: Food Poisoning

The primary concern associated with eating a spoiled egg is food poisoning, which can be caused by bacteria such as Salmonella.

While not every rotten egg contains harmful bacteria, spoiled eggs can provide conditions that allow bacteria to grow and multiply.

If contamination occurs, symptoms may appear anywhere from 6 to 48 hours after consumption and can include:

Nausea

Vomiting

Stomach cramps

Diarrhea

Fever

Headache

Fatigue and weakness

For most healthy adults, symptoms are temporary and improve within a few days. However, some cases can become more serious.

What Happens Inside Your Body?

When harmful bacteria enter your digestive system, your body immediately begins responding to the infection.

Bacteria such as Salmonella can irritate the stomach and intestines, triggering inflammation. This may lead to symptoms like vomiting and diarrhea as the body works to eliminate the source of infection.

Rotten eggs also produce sulfur compounds responsible for the unmistakable “rotten egg” smell. While the odor itself is not necessarily harmful, it is a strong indication that the egg has deteriorated and should not be consumed.

Not everyone faces the same level of risk—certain groups can experience more severe complications and should be especially cautious.