If you are one of the 10% to 20% of Americans with a ragweed allergy, fall may be more about a stuffy nose, itchy eyes, and sneezing than autumn leaves and Halloween fun with the kids. Mold is another allergy that may be worse in the fall. Unlike pollens, mold does not go away with the first frost and may collect in fallen leaves. If you have a mold allergy, you are also more likely to be allergic to year-round, indoor allergens like dust and animal dander. Here are 8 tips to fight fall allergies.