Allergies are a big problem on earth right now. Allergies happen when you eat something or smell something and your body thinks its bad for you. That's called an allergic reaction. An allergic reaction is when an allergen goes into your body and it reacts by coughing,sneezing,itching and really rarely dying. An allergen is something that your body causes a reaction for. A lot of people have allergies these days .I have done a survey around my classroom and 75% of people have allergies, 20% of people don't have allergies and 5% of people weren't sure if they had allergies or not. The most common allergies are Hayfever (caused by pollen, mostly from hay), peanut allergy, bee allergy and drug allergy. I hope now you know more about allergies. Thank you for reading.