Does your baby have any allergies? Let's learn everything about skin testing!

Sometimes our little ones get allergic to different things, don't they? It could be food, it could be dust, or even things like animal fur. So, an important test to find out exactly what the allergy is for is called a skin test. Shall we talk about this in detail today? You will find answers to almost every question you have in your mind in this article.

What is a skin test? How is it done?

Simply put, a skin test is a test that is done on the skin to see if your child is allergic to something. This is the most common and effective way to find allergies. This test is usually done on the skin of the child's forearm or back.

The most commonly performed skin prick test

Let's see how to do this.

Imagine, when you take your child to see an allergist, he or a trained nurse will place a very small amount of the substance or substances that you think are causing the allergy (we also call this an ``allergen'') on the skin of the child's hand or back. These are deposited as tiny droplets on the skin.

Then, a very fine, small needle-like instrument is used to make a small puncture or a small hole in the skin where the substance was placed. This is not something that goes deep into the skin, but something that is done very superficially. This is called a ``Skin Prick Test''. Some people also call it a ``Scratch Test'' because it makes it look like the skin is being scratched a little.

You can test several things you think you might be allergic to at the same time – perhaps ten, fifteen, or even more – on your skin. For example, you can test several different foods (such as peanuts, milk, eggs), dust, pollen, and animal dander at once. When you do this, your child may feel a little prickly, sometimes a little scratchy. But it's not too painful. Little ones don't really mind this.

Then wait about 15 minutes to see what happens. If your child is allergic to something, the area where the substance was applied will become red, slightly swollen, and a wheal will appear, similar to a mosquito bite. The doctor will use a measuring tape to measure the size of the wheal and the red area around it (called a flare). The wheal and flare will usually disappear completely within 30 minutes to a few hours.

Does this hurt? Are there any risks?

Most of the time, children can tolerate this ``Skin Prick Test'' without much difficulty. As mentioned, there may be some discomfort and itching. That doesn't happen to everyone.

However, very rarely , some people may have a serious allergic reaction. This is very rare.This is exactly why it is said that such tests should always be done in a place where an allergist is present, and where all the necessary facilities and medications are available to treat such a reaction quickly if it occurs. So you have nothing to worry about unnecessarily, the doctors and staff are always prepared to deal with such a situation.

Are there other types of skin tests?

Yes, there are several other methods besides the `(Skin Prick Test)`. But these are done less frequently, in special cases.

• Intradermal Testing: This involves injecting a very small amount of the suspected allergen into the skin, just below the surface layer of the skin, with a small needle. This can give slightly more sensitive results than the Skin Prick Test.
• Patch Testing: In this method, the suspected allergen is applied to special patches, such as the child's back. These patches are left on the skin for about 48 hours (about two days). The patches are then removed and a reaction is observed. Sometimes, the test is repeated after three to four days. This is mainly used to find the cause of certain skin conditions, such as contact dermatitis.

But the most common and first-choice of these methods is the previously mentioned ``Skin Prick Test''.

What types of allergies can be detected with these skin tests?

This ``Skin Prick Test'' can detect many types of allergies. Simply put, these can be divided into three main categories:

1. Allergies caused by things in the environment

These are allergies that come from things around us that we breathe in.

• Dust Mites: These are tiny creatures that are invisible to the naked eye and live in the dust of homes, especially on bedding, pillows, sofas, curtains, and soft toys that children play with. Imagine if your baby starts sneezing, rubbing his eyes, and having a stuffy nose when he wakes up in the morning, it could be because of these dust mites.
• Pollen: At times, especially when flowers are blooming and trees are in full bloom, if your baby has difficulty breathing, red eyes, frequent runny noses, or sneezing, it could be due to pollen, or what we call pollen.
• Pet dander: If you have pets like dogs and cats in your home , their fur, saliva, and dead skin cells can cause allergies in some children.
• Mold: These grow in damp environments, such as in unventilated areas, on walls, and in bathrooms. These mold spores can also cause allergies.

2. Food allergies

Some foods can be allergic not only to children, but also to adults.

• Peanuts
• Eggs
• Cow's milk and dairy products
• Fish and seafood
• Wheat flour
• Soy
• Tree nuts (like almonds, cashews)

If you experience symptoms such as hives, swelling of the lips, difficulty breathing, stomach ache, and vomiting after eating these types of foods, it could be a food allergy.

3. Allergies to certain medications

Some medications can also cause allergies.

• An example is antibiotics like penicillin .
• Some people can also be allergic to medications, such as some painkillers.

So if you have any doubts about various allergies like this, this ``Skin Test'' is very helpful in finding out exactly what it is.

What other important things should I know?

There are a few more things you should be aware of.

Do certain medications affect the test?

Yes, this is very important. Some medications your child is taking, especially antihistamines (e.g., Piriton, Cetirizine, Loratadine), can affect the results of this skin test. This means that if the test is done while the child is taking these medications, the skin reaction may not show up, or the reaction may be reduced. This could lead to incorrect results.

Therefore, before having this test, you should tell the doctor about all the medications your child is taking (both those prescribed by the doctor and those you buy from the pharmacy). The doctor will tell you how many days before the test you should stop taking these medications. Usually, they will tell you to stop taking these medications for about 3 to 7 days. It is essential to follow these instructions exactly to get an accurate result.

Is just a skin test enough? Or do you do more tests?

While skin testing is a very useful and important first step in diagnosing allergies, sometimes doctors need to do other tests to confirm the information further. That is, there are times when more evidence is needed to determine whether a child is truly allergic to something and how severe it is.

• Blood Tests: Sometimes specific IgE blood tests can be done. These blood tests can also detect some allergies. These blood tests are especially useful for children who have severe skin conditions (e.g., severe eczema) or who cannot stop taking medications such as antihistamines.
• Oral Food Challenge: This is the gold standard method for diagnosing a food allergy.But this is done very carefully, under the close supervision of a doctor and a trained nursing staff, in a hospital environment. What is done here is that the child is given the food that is thought to be the cause of the allergy, starting with a very small amount and gradually increasing it. They are carefully monitored to see if there is any allergic reaction. It is not advisable to do this at home.

So, the doctor will take the results of the skin test, the child's symptoms, the family's allergy history, and the results of other such tests (if necessary) together to come to a final conclusion about your child's allergy.

So, what are the things we need to remember from all of this? (Take-Home Message)

Okay, let's summarize some of the things you need to keep in mind from what we've talked about:

• Skin testing, especially skin prick testing, is a quick, reliable and effective way to find out what your child is allergic to.
• Although there may be some discomfort and itching during this test, it usually does not cause severe pain.
• Because a severe reaction can occur very rarely, it is safest to have this test performed by an allergist or a trained physician in a medical facility with medical facilities.
• This can detect allergies to environmental substances (dust, pollen), foods, and some medications.
• Before the test, don't forget to tell the doctor about all the medications your child is taking, especially antihistamines. If necessary, stop taking them a few days before the test, as directed by your doctor.
• Sometimes, in addition to this skin test, blood tests or oral food challenges may also be required to arrive at an accurate conclusion.

Finally, if you suspect that your child has an allergy, such as frequent sneezing, itching, wheezing, or difficulty eating certain foods, it is best to talk to a doctor about it and, if necessary, get a test like this. Then you will be able to find out exactly what is causing the allergy, provide your child with relief, control the allergy, and avoid giving up certain foods for no reason.

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