People with skin allergies should avoid eating crab. Crab is cold in nature and salty in taste, containing a rich array of trace elements and is a high-protein food. Traditional Chinese medicine believes that crab has the effects of clearing heat, relaxing tendons and activating blood circulation, and facilitating joints. However, it is also considered a product that can activate internal wind, classified as an allergenic food. Similarly, Western medicine recognizes crab as a form of foreign protein. Clinically, we have seen patients who are allergic to crab, so for those with skin allergies, we do not recommend eating crab.