当年轻的女性穿耳洞的时候，她们第一次接触到镍金属，因此他们很可能对产生过敏反应的镍金属形成过敏。

Young girls are often first exposed to nickel when they get their ears pierced, and therefore are more likely to develop a sensitivity to the metal that can cause allergic reactions later on.

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食物过敏最严重的是产生所谓的过敏反应。

The most severe form of food allergy is called anaphylaxis.

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尽管如此，他们认为可能与人体基因的某些组成成分有关，因为研究表明，那些有花粉病，气喘或是家庭成员中有过敏反应的人更加有可能患食品过敏反应。

There does, however, appear to be a genetic component, as studies show those who suffer from hay fever, or asthma, or who have family members with allergies, are more likely to develop food allergies.

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