Crab is a delicious delicacy on the dinner table today, but there is a group of people who experience allergic reactions in their bodies after eating crab. When this symptom occurs, it should be treated promptly. The treatment of crab allergy also depends on the patient’s symptoms. If the allergic symptoms are mild, there is no need to take medication and the symptoms will recover on their own after one or two days. However, if the symptoms are severe, such as itching, nausea, vomiting, abdominal pain, etc., treatment should be taken immediately and some anti-allergy drugs can be taken. At the same time, you can increase the intake of vitamin C in the body. If an itchy red rash appears on the skin, some anti-inflammatory ointment can be applied. If the patient has difficulty in breathing, panic attacks and slowed heart rate, he should go to the hospital immediately. During this period, you must be careful not to eat some seafood and to eat a light diet. For patients who know they are allergic to seafood, they must pay more attention when consuming seafood in daily life. Try to eat less seafood, but also to master the use of some seafood, for example, crabs should be steamed and boiled before they can be eaten, crabs raw is not eaten.