There are a variety of symptoms when it comes to allergic reactions including swelling, itching, and redness around the eyes, eyelids, muzzle, nose and ears. In more severe cases, signs may include generalized hives, severe facial swelling and difficulty breathing. Insect bites and stings, food allergies and reactions to vaccinations are just some of the variety of reasons that allergic reactions can happen. Sometimes it is difficult to determine the underlying cause of the reaction.
Most animals will need to see a veterinarian to receive the initial allergy medication by injection but call your veterinarian first for advice. Over the counter diphenhydramine (Benadryl) is an antihistamine and is a common treatment for allergic reactions. If your pet is less than 10 pounds, the liquid form of diphenhydramine is easier to administer than the larger, tablet form. Prior to using any medication, please contact your veterinarian to recommend an appropriate dose for your pet.