What to Know About Allergy Testing

With more than 200 different allergens, it is difficult to pinpoint the exact cause of your allergies without a proven, standardized method, or medical professional to administer the procedure.

AllergyX Allergy
An allergy is the exaggerated response of the immune system to a foreign substance that is generally safe and poses no threat to the human body.
skin testing can identify the culprit behind your allergic reactions. Speedy, efficient, and effective, there’s no reason to be scared of allergyX allergy
An allergy is the exaggerated response of the immune system to a foreign substance that is generally safe and poses no threat to the human body.
testing. If you keep having itchy, runny, or congested nose; red, watery, and itchy eyes; or red, itchy skin rash, welts, bumps, and hivesX hives
Hives (also known as urticaria) are swollen, red bumps or welts on the skin that are itchy, and can appear as a result of the body’s reaction to certain allergens. These bumps or welts can appear anywhere on the body, including the face, lips, tongue, throat or ears.
, it’s important to visit your doctor, or make an appointment with an allergist, to determine what the causes may be.

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What Are Common Causes of Allergy?

The most common airborne causes of allergic reactions include:

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Pollen

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Pet dander

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Mold

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Dust mites

Many people are also allergic to:1

  • Certain types of food (nuts, shellfish, soy, milk)
  • Insects and insect bites (insect droppings, bee stings)
  • Household chemicals (detergents, disinfectants, hair dye)
  • Clothes or materials made of polyester, nylon, spandex, rayon, or rubber

Which Allergies Can You Get Tested For?2

AllergyX Allergy
An allergy is the exaggerated response of the immune system to a foreign substance that is generally safe and poses no threat to the human body.
testing can determine if you have the following allergies:

  • Hay feverX Hay fever
    See Seasonal Allergies
    (allergic rhinitisX rhinitis
    An inflammation in the mucous lining of the nose.
    ) or allergic asthma due to airborne allergens like dust mitesX dust mites
    A common trigger of indoor allergies. These microscopic mites live in the fibers of pillows, mattresses, blankets and carpets, and survive off of our dead skin cells. The inhalation of dust mite droppings can cause allergic reactions which include a runny nose, sneezing and nasal congestion.
    , pollenX pollen
    A fine, powdery substance (typically yellow in colour) consisting of microscopic grains that are discharged from the male part of a flower (also known as stamens), or from the male cone of a tree.
    , moldX mold
    A parasitic, microscopic fungi which floats in the air like pollen. Mold spores are a common trigger for allergies, and grows well in damp areas of the home, such as a basement or bathroom. It can also thrive in an outdoor environment, such as damp grass, leaf piles, hay, mulch, or under…
    , or pet dander
  • DermatitisX Dermatitis
    An inflammation of the skin that occurs as a result of direct contact with an irritating substance, or an allergic reaction. Symptoms include redness, itchiness, and in severe cases, blistering.
    or eczema, which may be caused by airborne allergens, food, or contact with certain substances
  • Food allergyX allergy
    An allergy is the exaggerated response of the immune system to a foreign substance that is generally safe and poses no threat to the human body.
    caused by nuts, shellfish, soy, milk, etc.
  • Penicillin allergy from medicine
  • Bee venom allergy or other allergies to insect bites and venom

How Does Allergy Testing Work?3

Typically, allergyX allergy
An allergy is the exaggerated response of the immune system to a foreign substance that is generally safe and poses no threat to the human body.
tests are conducted by introducing small amounts of allergens into your skin, and then monitoring for a reaction.

The allergens used in the test are proteins that come from different substances or species that trigger allergies. You’ll be able to tell not only if you’re allergic to pet dander, but whether you’re allergic specifically to dogs or to cats. Substances you’re allergic to will cause red bumps or irritation on the skin. The larger the bumps or the more intense the reaction, the more allergic you are to this substance.3

Before a test, your doctor may ask you to stop taking over-the-counter antihistamines, as they can lessen your reaction to the allergens. It is also recommended for you to jot down relevant details about your family’s medical history, lifestyle, and potential triggers before your appointment. This will help you and your doctor understand your symptoms and their possible causes better.

Types of Allergy Testing

AllergyX Allergy
An allergy is the exaggerated response of the immune system to a foreign substance that is generally safe and poses no threat to the human body.
Skin Tests

Skin tests have been proven successful for more than 100 years and can quickly produce results during your visit.4

During an allergyX allergy
An allergy is the exaggerated response of the immune system to a foreign substance that is generally safe and poses no threat to the human body.
skin test, your skin will be marked with a pen to identify each substance being tested. A drop of each allergenX allergen
A foreign substance which your body perceives to be harmful; can trigger an allergic reaction.
is placed on the pen mark on your skin and then pricked (or injected). Allergists usually test the skin on your forearms or back5:

  • PRICK TEST
    The “prick test” or “scratch test” is the most common procedure. It can test your reaction to 50 different allergens. During this test, droplets containing a diluted allergen will be applied onto the skin. The surface of the skin is then pricked or scratched, allowing the allergens to enter and be absorbed into the skin.
  • INTRADERMAL TEST
    An intradermal skin test is similar to the prick test, but uses a thin needle to inject the diluted allergen into the outer layer of the skin, called the epidermis.
  • PATCH TEST
    A patch test uses patches or bandages containing the common allergens that cause contact dermatitisX dermatitis
    An inflammation of the skin that occurs as a result of direct contact with an irritating substance, or an allergic reaction. Symptoms include redness, itchiness, and in severe cases, blistering.
    . You'll have to wear the patch or bandage for 48 to 96 hours before returning to your provider to determine results.6 Your provider will check if the patch or bandage caused reactions like redness, rash, or swelling on the skin.

Allergy Blood Tests
In some cases, a doctor may draw blood and send it to a laboratory rather than conduct a skin test. However, blood tests are not as common – they can result in false positives, take longer, and cost more. It is usually considered for patients who cannot discontinue allergy medicine; patients with skin conditions that bar them from safely undertaking skin tests, or conditions that may interfere with skin test results; and patients who may suffer from severe symptoms or medical complications upon exposure to allergens.

What are the Risks in Allergy Testing?

While most allergyX allergy
An allergy is the exaggerated response of the immune system to a foreign substance that is generally safe and poses no threat to the human body.
tests involve pricking the skin, this should cause only a slight discomfort, and it is far less invasive than getting a shot. AllergyX Allergy
An allergy is the exaggerated response of the immune system to a foreign substance that is generally safe and poses no threat to the human body.
symptoms that arise out of a prick test or intradermal test typically go away within 1-2 hours. There is little to no chance of anaphylactic shock in healthy patients. 7

When Should You Get an Allergy Test?

Watch out for these symptoms. Book an appointment for an allergy test if these symptoms persist for more than a week or two, and especially if they keep coming back.

  • Constant sneezing
  • Itchy, runny, or blocked nose
  • Itchy, red, or watery eyes
  • Itchy, irritated throat
  • Tightness in the chest
  • Coughing or wheezing
  • Sinus pain or pressure

Where Can You Book an Allergy Test?

There are many public and private clinics, hospitals, where you can get an allergy test in Singapore. It is best to call your long-time doctor or your primary care provider first to inquire if they can provide you the test, or to request for a referral or a recommendation to an allergy specialist.

Preparing for Your Allergy Test

It’s important to log your allergy symptoms before visiting the allergist. Additionally, disclose all of your medications to your allergist and discuss when you may need to discontinue the medication you’re taking prior to your test. Many doctors recommend discontinuing antihistamines three days to a week before a test for more accurate results

What’s Next?

Following the results of the allergy test, you’ll be able to pinpoint the allergens causing your symptoms and begin preparing for when and how to anticipate your triggers. You will likely find that simple adjustments to your daily or night-time routine can prevent or limit the allergens from causing you discomfort and enjoy life to your fullest.