When allergy is suspected, doctors usually advise either a skin prick test or an allergy blood test (specific IgE). Both help find what you are allergic to, but each has its own advantages. In this video, Dr. Dipak Viradia, Chest Physician & Intensivist, explains the difference and how the right test is chosen.
| Skin Prick Test | Blood Test (Specific IgE) | |
|---|---|---|
| How it’s done | Tiny drops of allergens placed on the forearm and gently pricked | A small blood sample is taken |
| Results | Within about 15–20 minutes, in the clinic | Usually within a few days, from the lab |
| Pain | Minimal; mild itching at test spots | Only a needle prick for the blood sample |
| Anti-allergy medicines | Some need to be paused before the test | Can be continued; results not affected |
| Skin conditions | Not suitable with widespread eczema or rash | Suitable |
| Young children | Possible, depending on age and cooperation | Often easier |
| Risk of reaction | Very low; done under supervision | None from the test itself |
| Sensitivity | Very sensitive for common airborne allergens | Slightly less sensitive in some cases |
Neither test is “better” in every case. Your doctor chooses based on your situation:
One rule for both tests: a positive result shows sensitisation, but it means allergy only if it matches your symptoms. Results should always be interpreted by a doctor together with your history.
Dr. Dipak Viradia
Chest Physician & Intensivist | Interventional Pulmonologist & ECMO Specialist
Rudrax Chest Clinic, 301, Solaris Royce, Opp. Old RTO, Athwagate, Ring Road, Surat – 395001
Appointment: +91 75676 19985
Website: www.drdipakviradia.com
Both are reliable. The skin prick test is quick and very sensitive, while the blood test is useful when medicines can’t be stopped or the skin isn’t suitable for testing. Your doctor chooses based on your situation.
Some anti-allergy medicines need to be paused before a skin prick test. The blood test is not affected by them. Don’t stop any medicine without your doctor’s advice.
No. A positive result shows sensitisation. It means allergy only when it matches your symptoms on exposure.
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