Crustaceans such as crabs and shrimps in seafood are easy to cause allergies because they contain histamine and other ingredients. Tropical fruits such as mango and pineapple are also easy to cause allergies. When allergic, the skin will be red and rash, and there will be symptoms such as molting and itching. Because cosmetic surgery mostly has skin incision, allergy may cause edema at the surgical site, leading to delayed healing of the incision. If the skin at the plastic surgery site is scratched due to skin itching, it may also lead to local infection.