One of the characteristics of allergic reaction is its high speed, and the number of antibodies produced by the first contact with allergens is also related. Minutes to 1 hour is more common. The occurrence of allergic reactions caused by high protein in crabs is very common, especially in children, and most of them will not recur when they grow up. For adults, pay attention to eating too much high-protein seafood at one time, or consider not eating it. If it's serious, it's best to go to Shenyang's 201.