Environmental allergens are everywhere—pollen, ragweed, pet dander and dust mites can produce sneezing, itchy/watery eyes and runny nose in sufferers. Antihistamines taken before exposure to known allergens will help reduce the symptoms they produce. Food allergens can be dangerous leading to swelling, hives and breathing difficulties. Individuals with allergies to food should avoid those foods altogether and inspect ingredient labels carefully. Insect bites and stings can also produce allergy symptoms ranging from mild to severe. Over-the-counter options to treat allergies are numerous but for those with severe allergies or previous serious reactions may require emergency rescue injections (epinephrine) be kept nearby in case of a reaction.