The thing that makes you sneeze and cough is called an Allergy is a body reaction that occurs in people that are sensitive to certain substances. Scientists think that you might be able to inherit allergy from your parents. And you are most likely to have allergies if both your parents do. So genetics, infections, hormones, and smoking also have effects on whether or not you have or will have allergies.
Some people experience seasonal allergies , like just in the summer when all the pollen comes out.
Some people may also have it all year-round if they are allergic to say dust, pets, foods, and other substances in the environment called allergens. Pollution may play a big role in allergies if you don't live in a clean environment. In an allergic reaction, the immune system mistakenly interprets a harmless substance as a harmful one. The immune system responds by producing antibodies. When you first get or find your allergen or what your allergic to, there is no allergic symptoms made.