Achoo! Many things can trigger allergies, like pollen, certain animals, foods, or a bee sting. Allergies can make your eyes water and your nose run, make your skin itchy and bumpy, make your throat and ears sore, and make your tummy ache. They can even give you diarrhea . . . gross! But don't worry. If you have an allergy, you can go to a special doctor called an allergist who will make sure you feel better again.