Because crabs and sweet potatoes will react and produce stones.

Crabs should not be eaten with the following foods:

Destroy each other

Crab+Sydney: causes diarrhea and damages the stomach.

Crab+pear: Eating together will hurt your stomach.

Crab+loach: The function is just the opposite, and it is not suitable for eating together.

Crab+persimmon: eating together will make you sick and poisoned.

Crab+perilla leaf: abdominal pain

Crab+cherry tomato: Arsenic will be poisoned.

Crab+melon: easy to cause diarrhea.

Crab+tomato: Arsenic will be poisoned.

Crab+celery: Eating together will cause absorption in protein.

Crab+pumpkin: eating together will be toxic.

Crab+honey: poisoning

Crab+sweet potato: easy to condense into persimmon stone in the body.

Crab+eggplant: harm to stomach

Crab+cold food: can cause diarrhea.

Crab+pomegranate: stimulates gastrointestinal tract, causing abdominal pain, nausea, vomiting and other symptoms.

Crab+eggplant: Eating together will hurt your stomach.

Crab+persimmon: abdominal pain

Crab+Sydney: causes diarrhea and damages the stomach.

Crab+orange: soft carbuncle

Crab+pear: cause diarrhea and damage the stomach.

Crab+fragrant pear: it hurts the stomach

Crab+grape: discomfort

Crab+peanut: diarrhea