Cutting into a watermelon is usually a refreshing moment — bright red flesh, a sweet aroma, and plenty of juice. But if you slice one open and notice foam bubbling or oozing from the inside, stop immediately and throw it away.
This isn’t a harmless oddity. It may be a sign that the watermelon has begun to ferment and spoil, and eating spoiled fruit could make you sick.
Why Foaming Watermelon Is a Red Flag
Watermelon is naturally high in sugar, which makes it susceptible to fermentation when microorganisms such as
