Allergies are a normal response to typically harmless substances, but can be quite cumbersome. No matter where you are, you will be exposed to many different allergens including trees, grasses, molds, and certain animals or parasites. Every allergen will affect you differently and your symptoms may come and go with each season. You could experience a range of reactions. Some of the most common symptoms may include a runny nose, nasal congestion, itchy / watery eyes, or sneezing / coughing.