Knowing which foods to avoid can help reduce allergy flare-ups, and some may surprise you, here are six common foods to look out for. Nuts People with seasonal allergies, especially to birch pollen, may experience cross-reactivity with certain nuts like hazelnuts and almonds, triggering similar allergic reactions. Chamomile Chamomile may worsen seasonal allergies in sensitive individuals, as it contains proteins that can mimic pollen and sometimes cause rashes or respiratory symptoms. Certain Fruits and Vegetables Some raw fruits and vegetables can trigger reactions in those with pollen allergies due to cross-reactive proteins, especially during peak allergy seasons. Spicy Foods Spicy foods like chili peppers and jalapeños contain capsaicin, which may increase histamine levels and worsen symptoms like runny nose and watery eyes. Alcohol Alcoholic drinks often contain histamines and sulfites, both of which can increase inflammation, congestion, and other allergy-like symptoms in sensitive individuals. Dairy Products Some dairy items, especially aged cheeses and yogurt, may contain histamines that potentially contribute to mucus buildup and allergy-like reactions.