You can’t eat crabs after tooth extraction. The hard shell of crabs can easily cause the rupture of the tooth extraction wound, which sometimes leads to the dislodgement of the blood clot, inducing the occurrence of dry socket, and the debris of crabs can cause bacterial infection after entering into the alveolar fossa, which can lead to maxillofacial swelling in serious cases. Crab belongs to the cold food is not conducive to wound healing, crab needs to be eaten at high temperatures, will lead to capillary contraction, resulting in increased exudate caused by swelling, crab in the processing will be put into the yellow wine, green onion, ginger, etc., and some patients need to take cephalosporins and other antibiotics after tooth extraction, and the combination of alcohol will have an adverse effect on the body.