Crabs are cold, because they need to breastfeed their children. After eating them, mothers will pass them on to their children through breast milk. Crabs are not only cold, but also contain purine, which is easy to cause infantile diarrhea and allergic reactions. If you only taste a little crab, the impact will not be great. Pay attention to observe whether the child has allergic reactions, and it is best not to be greedy.