Signs of flea bite allergy result from hypersensitivity (allergy) to flea saliva. In an allergic dog, the bite of a single flea may cause a serious problem. Extensive skin damage may result from the dog's biting, licking, and scratching. Although flea bite allergy can be treated, it often recurs because flea eggs may hatch up to 1 year after being deposited in the environment. Most of the flea's life cycle occurs off the dog. Your dog's environment may be contaminated with fleas, and even an occasional flea bite can trigger the allergic reaction.

Flea allergies are most troublesome in the summer and fall in areas with cold winters and warm summers. In warm climates or in heated flea-infested houses, flea allergy may occur throughout the year.

In dogs, the main signs of flea allergy are excessive hair loss and severe scratching and biting. Skin sores develop primarily around the base of the tail, in the middle of the back, and on the abdomen. Skin infections are common.

Flea control is the number one treatment for flea allergy! Desensitization ("allergy shots") to flea saliva is controversial. In some cases, good results are achieved, while other dogs fail to respond.

We, at Animal Health Services, will be glad to assist you in finding the most appropriate treatment for your dog.

Adapted from Canine and Feline Medical and Surgical Problems by Erlewein and Kuhns (3rd edition)