If there is anything that most people find harmless but makes you uncomfortable when you consume them, inhale them or even touch them, there is every possibility that you are allergic to them. The items or substances that cause irritation and adverse reactions are known as allergens. There is a wide array of allergens like animal dander, insect stings, certain food items, specific medicines, atmospheric conditions, synthetic fabric and many more. These vary widely from person to person.
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