The best way to treat feline allergies is to remove the allergen from the cat's environment, says the Pet Health Network. Other treatments include corticosteroids, anti-inch ointments, shampoos and antihistamines, according to Peteducation.com.
One common type of feline allergy is flea-bite sensitivity. It only takes a couple of bites to cause a reaction, states Pet MD. Cats can also suffer from behavior problems that are a direct result of this allergy. Since it is difficult to completely rid the cat of all fleas, especially outdoor cats, additional medication may be required for this condition. Owners of cats with this type of allergy must be vigilant about flea control and check their cats often.