I had terrible nasal allergies and headaches till I discovered the main culprits - sugar, cocoa, coffee, wheat, dairy and
tomatoes (
tomatoes caused a skin rash on one specific part of my body only). When I cut these foods out, those problems quickly became history. Benadryl will only treat your symptoms and if the cause is some food you are eating on a daily basis, remember that whenever you eat that food, your immune system goes into overdrive, which over time is not a good thing.