It is true, but the degree is different, because mango contains allergenic proteins, pectin, and aldehyde acids, which can irritate the skin and mucous membranes and cause allergies. Especially unripe mangoes often contain high levels of allergenic substances. When we eat mangoes, the juice and pulp of the mangoes often come into contact with the skin around the mouth, causing them to come into contact with the allergenic substances contained in the mangoes and cause allergic reactions. Therefore, although mangoes are delicious, you need to be careful before eating them.