What is an allergy test?
An allergy test looks for signs that your immune system is sensitised to a particular substance. Common approaches include a skin prick test and a blood test for allergen-specific IgE. A positive test does not always mean that the substance is causing your symptoms; a clinician interprets it with your history and exposures.
Skin prick test or blood test?
Skin prick testing (SPT) places small amounts of selected extracts on the skin. Responses are typically measured at the clinic after about 15–20 minutes. It is performed under appropriate clinical supervision.
Specific IgE blood testing measures antibodies to selected allergens from a blood sample. A doctor may choose it when skin testing is unsuitable, for example because of certain skin conditions or medicines that affect the skin response.
Neither test should be used as a stand-alone diagnosis. The appropriate allergens to test depend on the symptoms, their timing, possible exposure, and a clinician’s judgement.
Which potential triggers might be considered in India?
Depending on a person’s history, a clinician may consider house dust mites, pollen, mould, pet dander or selected foods. Food panels without a matching history can be misleading: a positive result alone does not prove food allergy. Keep a record of symptoms and the circumstances in which they appear to support a targeted conversation.
How should you prepare?
Tell the clinic about medicines, previous reactions, asthma, and skin conditions before booking. Some medicines, including antihistamines, can affect skin test responses. Do not stop prescribed medicine on your own: follow the testing clinician’s instructions.
What happens after the result?
A doctor can compare test findings with your symptoms, discuss exposure management, and decide whether further evaluation or a treatment pathway is appropriate. For some confirmed, clinically relevant allergies, doctor-prescribed sublingual immunotherapy may be considered.
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