allergy-test

Skin Prick Test Singapore

An allergic reaction can manifest as a broad spectrum of medical conditions ranging from a mild rash to severe swelling or even an anaphylactic shock. If you suffer from an acute reaction after coming into contact with a particular substance, it is likely you have an IgE-mediated allergy.

It only takes 20 minutes to determine if one suffers from an IgE-mediated allergy by performing a skin prick test.

What is a skin prick test?

Otherwise known as a scratch or puncture test, a skin prick test (SPT), is the gold standard for allergy testing. It is carried out to analyze if one or more of the allergy-causing substances used will cause an immediate allergic reaction. Supplemented with your medical history details, a skin prick test may be able to ascertain if a particular substance you inhale, touch or eat is causing and adverse reaction.

What is a Doctor Home Visit?

How is a skin prick test carried out?

A skin prick allergen test involves placing a drop of solution containing a food allergen on your forearm or back. If you have an allergy to said substance, a reddish, elevated bump will appear. There may also be some itching.

  • Our doctor will gently prick or scratch the surface of your skin with a fine needle to allow the solution to enter just below the surface of the skin.
  • This scratching of the surface of the skin feels similar to a fingernail scratch and is not painful. There will also be no excessive bleeding.

What results can I expect?

Results of the skin prick test should start to show on your skin after 15 to 20 minutes.

Your doctor will observe for any swelling, redness or other signs of a reaction on the skin. If you are allergic to any of the solutions, your skin will respond by developing a mosquito-like bump known as a wheal. Your skin will be raised, red and even itchy. A measurement of the bump size is then recorded.

If your skin does not respond to any of the solutions, it is considered a negative test result and means you are not allergic to a particular allergen.

What allergies can a skin prick test detect?

A skin prick test detects common harmless substances that cause allergies known as allergens.

Common allergens are:

  • Certain foods (such as nuts and shellfish)
  • Certain medicines (such as penicillin)
  • Dust
  • Mould
  • Pollen
  • Animal dander

Frequently Asked Questions

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Is a skin prick test painful?
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How long does it take to get a skin prick test result?
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What is the disadvantage of a skin prick test?
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Are skin prick tests safe?
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Is a skin prick test or blood test better to test allergies?
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Can you eat before a skin prick test?
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How accurate are skin prick tests?
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How old must my child be to get a skin prick test?