The cause of mango skin allergy may be related to the allergenic ingredients in the mango skin, hormones or pesticides in the skin, personal constitution and other factors. 1. Allergenic ingredients in mango peel: the allergenic ingredients such as chitinase in mango peel will stimulate the human skin mucous membrane, thus leading to allergic reactions, causing the occurrence of mango peel allergy; part of the mango peel that is not fully ripe contains aldehydic acid and other allergenic substances, which will also have a perverted reaction on the skin mucous membrane, thus causing the occurrence of allergic reactions. In summary, so part of the population in contact with the mango peel is easy to appear in contact with the site of itching, erythema, rash and other allergic symptoms, and in severe cases, even blisters, liquid oozing and other manifestations. 2. Hormones or pesticides in the skin: there may be ripening hormones or pesticide residues on the skin of the mango, in contact with the skin of the mango, these residues of harmful chemicals may cause some people to have an allergic reaction, which manifests itself as an allergy to the skin of the mango. 3. Individual constitution: some allergic people, there may be their own immune disorders and other conditions, in contact with the mango skin may cause rapid-type hypersensitivity, allergic reactions, such patients may also be allergic to seafood, pollen and other irritating substances. In summary, a variety of reasons can lead to mango skin allergy, it is recommended that such patients to avoid contact with mango, such as the occurrence of allergy phenomenon should seek medical attention in a timely manner to avoid further aggravation of the condition.