What should you know about general allergy test?

Testing may use a skin-prick method or a blood sample to look for an immune response to particular allergens. The panel should reflect the pattern of symptoms and likely exposures, such as foods, house dust mites, pets or pollens. A positive result can show sensitisation, but it does not by itself prove that the substance causes symptoms. A negative result also needs clinical context.

Allergy testing is different from investigating every cause of a blocked nose, itchy eyes, cough or stomach symptom. Conditions such as allergic rhinitis, allergic conjunctivitis, asthma and food allergy may require different assessments. Anaphylaxis is a medical emergency, not a result to monitor at home.

Record what happened, what you were exposed to, how quickly symptoms began and whether the reaction happened again. Tell the clinician about medicines, pregnancy, skin conditions and previous severe reactions. Do not deliberately eat or contact a suspected trigger to test yourself. A focused history helps avoid confusing a laboratory result with a diagnosis.

Call emergency services for sudden breathing difficulty, throat or tongue swelling, faintness, widespread hives with vomiting, or rapidly worsening symptoms after an exposure. These can be signs of anaphylaxis and need immediate treatment; do not wait for allergy testing.

Ask which trigger is being investigated, whether skin or blood testing is more suitable, how medicines could affect the result, and what action should follow a positive or negative finding.