Airborne allergy testing: what patients should know

A positive result supports an allergy diagnosis only when it matches your symptoms and exposure pattern. It does not, by itself, prove that a particular substance is causing every episode.

A skin prick test places small amounts of selected allergens on the skin and checks for a local reaction. A blood test measures allergen-specific immune antibodies. Your clinician chooses the panel from your history rather than testing indiscriminately.

Sensitisation means the immune system recognises an allergen; clinical allergy means exposure also causes relevant symptoms. The result is interpreted alongside timing, season, home or work exposures, and problems such as sneezing, itchy eyes, cough or wheeze.

Bring a list of symptoms, where they occur, possible triggers, medicines and previous reactions. Some antihistamines can interfere with skin testing, so follow the testing service's instructions; do not stop prescribed medicine without confirming what is safe for you.

After interpretation, management may include reducing a confirmed exposure, choosing symptom medicines, reviewing asthma control or discussing allergen immunotherapy when appropriate. Broad avoidance without a matching history can be burdensome and may not help.

Arrange a clinical review if recurring nasal, eye, skin or breathing symptoms disrupt sleep or daily activities, or if over-the-counter treatment is not controlling them.

Call emergency services for sudden breathing difficulty, throat or tongue swelling, faintness, collapse, or rapidly worsening symptoms after an exposure. Use prescribed emergency medicine immediately according to your action plan while help is coming.

Ask which allergens fit your history, whether skin or blood testing is more suitable, which medicines could affect the result, and how a positive finding would change your treatment. Also clarify whether breathing symptoms warrant an asthma assessment.