Physicians trying to determine the cause of an allergic reaction will compile a medical history and a list of symptoms. They will also perform a physical examination.

In addition, an allergy skin test may be performed to help diagnose the patient. This test involves introducing a small amount of an allergen to the patient’s skin to determine if the person is allergic to that allergen. If a rash or small bump develops, the patient is most likely allergic to that substance. Physicians typically test for dander first. If the test is negative, the physician may test for other allergens, such as saliva and urine.

Alternatively, a physician may order a blood allergy test. These tests look for the presence of allergy-specific immunoglobulin E (IgE) in the bloodstream. The most commonly used blood test for allergy conditions is the radioallergosorbent test (RAST).

The main form of treatment and prevention for cat allergies is avoidance – completely avoiding contact with cats to prevent the allergic reaction from occurring. However, many cat owners are unwilling or unable to part with their pet.

Therefore, treatment for cat allergies may also include medications like antihistamines and decongestants, as well as allergy shots (immunotherapy). People who choose to keep their cats can also lower their risk for symptoms by keeping the animal out of their bedroom. They should also avoid petting, kissing or hugging the animal.

However, it should be noted that individuals with significant cat allergies, or cat allergies that lead to asthma, must remove their cats.

In the rare instance when anaphylaxis occurs, the patient will require immediate medical attention. An injection of epinephrine is required to reverse the patient’s symptoms.