Opened canned tomatoes and saw bubbles rising immediately. Is that fermentation or spoilage

of the can, allowing microorganisms to enter. It’s also important to check the integrity of the can before purchase, avoiding those with dents, bulges, or rust.

If you encounter suspicious bubbles, assess the situation using the visual, smell, and texture cues discussed. If in doubt, it’s safest to discard the product.

Do not consume the contents if there are signs of spoilage or if the can appears compromised. It’s better to be cautious and prevent potential foodborne illness.