Crabs and sweet potatoes (sweet potatoes) have the same food. Crabs contain a lot of protein, calcium ions and chitin, while sweet potatoes contain a lot of starch, which will combine with protein after being mixed together, thus forming protein lumps.

Eating crabs and sweet potatoes together can cause abdominal pain, bloating, diarrhea and other uncomfortable symptoms, and even lead to the formation of stones. Persimmon, pomegranate, baked sweet potato, honey and other foods should not be eaten with crabs.