Symptoms:

• Coughing
• Difficulty breathing
• Hives
• Itching of the nose, eyes, throat, or skin
• Rash
• Redness in the eyes
• Runny nose
• Sinus pressure
• Sneezing
• Tearing eyes
• Wheezing

Signs and tests:

The doctor will perform a physical exam and ask you questions about your symptoms. The history of symptoms is important in diagnosing allergies, including whether the symptoms vary according to time of day or the season and possible exposures such as having a pet in the household.

Allergy testing is done to see identify the specific allergens that are causing your symptoms. Skin testing is the most common and useful method. This may include scratch, patch, or other tests.

If your doctor determines that you cannot undergo skin testing, a RAST blood test (to look for IgE antibodies to a specific allergen) may be helpful.

Having allergies may also alter the results of the following tests:

• WBC count, particularly eosinophil count
• Serum immunoelectrophoresis