What should you know about spectrum allergy testing?

A positive test can indicate sensitisation, while a negative result can make a particular IgE-mediated allergy less likely. Neither result should be read in isolation. A reaction that occurs after eating a food is assessed differently from symptoms that appear around pets, dust or seasonal pollen. Conditions such as allergic rhinitis, asthma or food allergy may have different patterns.

Keep a symptom diary with the suspected trigger, timing, amount of exposure and symptoms. Bring labels or ingredient lists when food is involved. Follow the testing plan exactly and avoid broad elimination diets without professional advice. If a clinician confirms a trigger, ask how to reduce exposure and whether you need an emergency action plan.

Seek emergency care for trouble breathing, swelling of the lips or tongue, widespread hives with weakness, repeated vomiting with other symptoms, or faintness after possible exposure. These features can occur with anaphylaxis. Persistent blocked breathing, wheeze, or eye and nasal symptoms without emergency features still deserve a planned review.

Ask which test is being used, why each trigger was selected, how a borderline result will be handled, and whether your medicines affect the assessment. Ask what symptoms should prompt urgent care and whether your pattern fits allergic conjunctivitis, pet allergy or house dust mite allergy.