Signs of an allergic reaction can include anything from itchiness, hives, swelling on face, redness and even collapse and shock. Like people, many pets have allergies to common things pollen, food and residues, etc. Allergies are especially common in dogs, however there are some allergic reactions that can cause the airway to swell shut therefore becoming a life-threatening emergency.
Allergies are immune responses to substances like pollen, dust, food, or fur that can cause discomfort and illness. Over time, exposure to those substances, called allergens, can sensitize the immune system and cause a harmful over-reaction. Itchiness is the most common symptom of allergic reactions. If left untreated this itchiness can cause sores, hot spots and skin infections. Animals having an allergic reaction to something requires some basic first aid. First try to identify the allergen and remove the animal from the allergen. Next wipe any residue, pollen, etc. off the animal. You can use a mild shampoo, such as an oatmeal shampoo, to wash the animal if necessary. You can also put a cool compress on any itchy areas of the skin. Always consult a veterinarian before giving any antihistamines to the animal.
While more uncommon, severe allergies can cause a condition called anaphylaxis. Anaphylaxis can be caused by insect stings, medications, vaccines and certain foods. Anaphylaxis shows such symptoms as diarrhea, vomiting, shock, seizures, coma and then death. This type of allergic reaction is a life-threatening emergency. It needs veterinary attention immediately. A veterinary clinic has the necessary medications and equipment to help an animal in anaphylaxis. Keep animals calm and monitor their breathing and pulse while en route to the clinic. If the animal stops breathing be prepared to begin CPR.