There are four types of allergies that affect cats. These include:

Contact allergies are the least common of the four types of allergies in cats.
An allergy response occurs when your cat’s body ingests, inhales or otherwise comes in contact with a substance that triggers an inappropriate immune response. Most cats can be exposed to normal environmental factors such as pollen or other inhalants without suffering any negative consequences. The immune response manifests as inflammation and excessive production of water and fluid as the body attempts to protect its various systems by encapsulating or flushing out the irritants. In some cats, pollen allergies may be hereditary, while in others the cause is of unknown origin.
The following substances can cause allergic reactions in cats who are sensitive to them:
However, steroids have many dangerous side effects. The injectable forms in particular can cause diabetes. Steroids can also damage the kidneys over time. The primary action of steroids is to suppress the immune system, so that the inflammatory reaction to the allergen does not occur. This makes the cat more prone to infections. Steroids can also cause ulcers in the stomach and intestines (especially in dogs). Cats receiving steroids should not be vaccinated because the steroid prevents the immune system from responding to the vaccine. Allergies may last a lifetime so the ingredient must be permanently removed from your cat’s food.Among children, about one in seven between ages 6 and 19 prove to be allergic to cats.Another company, Felix Pets, also claims to be developing a breed of hypoallergenic cat.
The sad news is that there is no cure for allergies in dogs and cats. There are, however, ways to decrease allergen exposure and to address allergy symptoms in pets. Even if the patient is diagnosed definitively with an allergy to cat dander, he or she can most likely live comfortably with cats. The tips below are extremely effective in reducing the amount of allergens in the home. They come from Mercia Tapping, cat lover and president of .Yucca is a natural anti-inflammatory that helps the immune system function normally. It helps resolve symptoms without side effects common with steroids. Yucca should be given daily for allergies. , a concentrated liquid medication is a powerful product that is safe for cats and dogs with allergies. It can also be given in your pet's food or applied directly to areas of itching skin.Studies have shown that food allergies overall are the third most common type of feline allergy, outranked in frequency only by allergies to and inhaled substances. Although itchy, irritating skin problems are the most common signs of this allergy, an estimated 10 percent to 15 percent of affected cats also exhibit gastrointestinal signs, such as and . The treatment for feline allergies caused by fleas is obviously to use cat flea medicine. If your cat's skin is extremely traumatized, an additional cat medicine to decrease the itchiness and inflammation may be used temporarily. After other potential causes of the skin eruptions, such as flea bites, are ruled out and a food allergy is identified as the probable cause of the clinical signs, the next challenge is to identify what precisely in the cat’s diet is responsible for the problem. This process will most effectively be carried out at home by the owner’s introduction of what is termed a “novel” diet, which is based on the fact that most feline food allergies are traceable to the protein or carbohydrate content of an affected animal’s normal fare. The itching that typically signals the presence of a food allergy is caused by the eruption of small, pale, fluid-filled lumps on a cat’s skin, which form in response to the presence of an allergen, a substance to which the animal’s system is abnormally sensitive. Through repeated systematic testing—and a lot of patience—it is possible for the owner to pinpoint all dietary ingredients to which a cat is allergic. Therapy, it follows, requires the permanent exclusion of these ingredients from the cat’s diet.