1.Why does mango dermatitis occur? Mango dermatitis is generally only seen in certain allergic patients, occurring in contact with mangoes and not promptly cleaned with water, that is, will often cause perioral dermatitis, some can even involve the limbs, trunk and even perineum, may be due to indirect contact, manifested as local erythema, papules, etc., accompanied by itching, burning sensation, tingling, etc.. Because mango is rich in sugar, protein, carotene and various vitamins, but also contains mono- or dihydroxybenzene, a multiband or alkyl side chain phenols, catechol or resorcinol alkyl derivatives, which is a common allergen, raw lacquer is often caused by allergies because of the antigen. In addition, incompletely ripe mangoes also contain aldehydic acid, mainly glyoxylic acid, an organic acid with an aldehyde group, which has a certain irritating effect on the skin and mucous membranes, so sometimes eating mangoes can produce a burning and stinging sensation in the lips and tongue or oropharynx. In other words, there are substances in mango that can cause allergy and direct skin irritation. 2, before eating mango not allergic, now not necessarily Different varieties or ripeness of mangoes contain different concentrations of mono- or dihydroxybenzene or glyoxylic acid, coupled with its contact with the skin mucous membrane for different lengths of time, these can explain the consumption of mangoes in different situations will have different performance. Therefore, if an allergy occurs accidentally, it is best not to eat that type of mango again, and if you do want to eat it, it is best to use ripe varieties that have not been allergic before, not to be greedy for more, and to wash the contact parts in time after eating.