Flea allergy is very common in pets

As little as one fleabite every few days can cause severe itching and rashes

Treatment of flea allergy is primarily directed at decreasing flea exposure

What is Flea Allergy Dermatitis?

• Flea allergy is very common in pets. The presence of fleas is not an indicator of dirty household, it can happen to anyone. Flea allergic dogs and cats do not have to have a flea infestation as they are allergic to the flea’s saliva, and as little as one bite can cause a prolonged skin reaction. All dogs and cats can become flea allergic, and they may become allergic in as little as three months. Flea saliva contains compounds that are irritating as well as allergenic.

Clinical Signs

• The presence of visible fleas is not necessary to make this diagnosis. How your pet responds to flea control will determine the diagnosis.
  
• Clinical signs of flea allergy in dogs include intense itching at lower back, inner thighs, and tail base. Cats may show these same signs as well as itching of the neck. Hair loss, crusts, and scales in the affected region are common. Chronic cases may show skin thickening, increased pigmentation, “sweating”, and open sores.

Treatment

• Treatment of flea allergy is primarily directed at decreasing flea exposure. Many flea allergic pets actually have fewer fleas than non-allergic animals. This may be due to an immune response against the fleas when they feed.
  
• As with all allergies, there is no cure but control can be achieved. Short doses of oral Prednisone may be helpful in the beginning of treatment. Flea vaccines have been tried and have not been beneficial.
  All animals in the household must be treated as if they are flea allergic if one pet is flea allergic.