If you have skin allergy after eating shrimp, it is very likely that the protein of this shrimp meat has caused allergic reaction to your skin. Of course, it may also be other factors. For example, is it because some seasonings and ingredients for roasting shrimp are allergic to you? For example, garlic, such as pepper, such as fennel is possible, so first of all, you can't eat the same food in a short time. For active treatment, you can use Kangfumei collagen dressing or anti-allergic drugs, including even some people who need infusion in severe cases. After treatment, you should observe it again. If you eat shrimp again and the same situation occurs, then it is recommended that this friend never eat shrimp again.