What happens if a dog is allergic to fleas? Flea allergy dermatitis (FAD) is a severe allergic reaction to the bite of a flea. FAD can cause intense itching and painful skin wounds. Left untreated, affected animals can develop secondary skin infections. FAD can be treated by controlling fleas on the pet and removing fleas from the pet’s environment.
How do vets treat flea allergy? Your pet’s veterinarian will recommend a topical, oral, or injected medication to ease your pet’s itching and inflammation. If your dog or cat has an infection, the veterinarian may also prescribe an antibiotic or antifungal medicine. You may have heard that human antihistamines can treat pet allergies.
How long does an allergic reaction to fleas last in dogs? With FAD, the allergic reaction from the flea bites can continue for several weeks, causing the symptoms described above. Dogs with FAD only need to get one flea bite to develop itching lasting several days. This also means they do not need to be flea-infested to get itchy.
What does it look like when a dog is allergic to fleas? Itching and hair loss in the region from the middle of the back to the tail base and down the rear legs (the flea triangle) is often associated with FAD. Intradermal allergy tests (skin tests similar to those performed in humans) or specialized blood tests (IgE blood tests) can confirm flea allergy in your dog.