ทดสอบหาผื่นผิวหนังอักเสบด้วย Patch Test

Contact dermatitis is a skin condition caused by exposure to external substances. It presents with symptoms such as itching, skin rashes, swelling, redness, and sometimes oozing of fluid. In some cases, other forms of eczema may appear, such as darkened skin areas. The symptoms can vary depending on the stage of the condition. The main cause of this condition is exposure to external substances that come into contact with the skin, such as nickel, compounds in cosmetics, preservatives, fragrances, and elastic materials, among others.
&nbsp;
<h2>Recommendations for Individuals Undergoing Skin Allergy Testing</h2>
Skin allergy testing is performed to identify the cause of eczema in patients suspected of having dermatitis triggered by allergens. These allergens may include substances like nickel, paraphenylenediamine (found in hair dyes), and chemicals used in rubber production. In cases where the patient experiences an acute allergic reaction, symptoms such as hives, redness, and itching may appear in areas of the skin that came into contact with the allergen. In more severe cases, widespread hives or even symptoms such as facial swelling or difficulty breathing may occur.
&nbsp;
<h2>Types of Skin Allergy Testing</h2>
Skin allergy testing can be done in two ways:
<ol>
<li style="font-weight: 400;" aria-level="1">Patch Test: This test involves applying allergens to the skin where no rash is present. The allergens are typically applied to the back or upper arm. The results are read at 48 hours and 96 hours after the test is applied.</li>
<li style="font-weight: 400;" aria-level="1">Prick Test: This test is used for patients who experience hives due to contact with allergens. The results can be known within 20-30 minutes.</li>
</ol>
The choice of skin allergy test depends on the patient&#8217;s medical history and the characteristics of their skin condition. The doctor will assess this based on the patient&#8217;s history and physical examination.
&nbsp;
<h2>Who Should Undergo a Patch Test?</h2>
A Patch Test is used to identify substances that may cause contact allergies on the skin, especially for individuals with persistent or recurring rashes or chronic skin conditions. Those who should consider undergoing a Patch Test include:
<ol>
<li style="font-weight: 400;" aria-level="1">Individuals with recurrent or chronic contact dermatitis: Those who have a history of red, itchy rashes, blisters, or allergic reactions that frequently occur in areas exposed to chemicals such as cleaning agents, perfumes, metals, or topical medications.</li>
<li style="font-weight: 400;" aria-level="1">Individuals with a history of cosmetic or skincare product allergies: Those who develop rashes after using skincare products like moisturizers, perfumes, shampoos, or makeup.</li>
<li style="font-weight: 400;" aria-level="1">People with professions that involve regular contact with chemicals: This includes occupations like doctors, nurses, hairdressers, painters, jewelers, or anyone who works with chemicals, metals, oils, or rubber.</li>
<li style="font-weight: 400;" aria-level="1">Individuals who suspect metal or medical device allergies: Those who may be allergic to jewelry, metals from medical devices (e.g., dental implants or orthopedic hardware).</li>
<li style="font-weight: 400;" aria-level="1">Patients with eczema or dermatitis that does not respond to treatment: Especially if the skin condition (e.g., eczema or dermatitis) does not improve despite proper treatment.</li>
<li style="font-weight: 400;" aria-level="1">People who want to identify allergens to avoid future exposure: For individuals who have experienced an allergic reaction and wish to pinpoint the exact cause.</li>
<li style="font-weight: 400;" aria-level="1">Individuals with issues related to everyday products: This includes those who experience reactions from products like laundry detergents, household cleaners, or other daily-use materials.</li>
</ol>
&nbsp;
<h2>Instructions for Individuals Undergoing Patch Testing</h2>
<ol>
<li style="font-weight: 400;" aria-level="1">Keep the test area dry: Avoid getting the area where the test is applied wet.</li>
<li style="font-weight: 400;" aria-level="1">Do not scratch or rub the test area: Refrain from scratching or rubbing the area being tested.</li>
<li style="font-weight: 400;" aria-level="1">Avoid activities that cause excessive sweating: This includes outdoor exercise or strenuous physical activity.</li>
<li style="font-weight: 400;" aria-level="1">Do not remove the test patch yourself: If the area becomes very itchy, do not scratch. Take the antihistamine prescribed by your doctor. If you experience a burning sensation, remove the patch from the affected area or consult your doctor.</li>
<li style="font-weight: 400;" aria-level="1">Bring suspected allergens for testing: If you suspect an allergy to a specific substance, bring it along with details about the product, such as the ingredients listed on the packaging.</li>
</ol>
&nbsp;
<h2>Instructions for Individuals Undergoing Prick Testing</h2>
<ol>
<li style="font-weight: 400;" aria-level="1">Inform the doctor about antihistamine use: If you are currently taking oral antihistamines, inform your doctor. You should stop taking the medication at least 5 days before the test.</li>
<li style="font-weight: 400;" aria-level="1">Bring suspected allergens for testing: If you suspect an allergy to a specific substance, bring it along with the name and details about the product for testing.</li>
</ol>
&nbsp;
<h2>Benefits of Skin Allergy Testing:</h2>
<ol>
<li style="font-weight: 400;" aria-level="1">Identify the cause of eczema: It helps determine the allergens causing contact dermatitis (eczema).</li>
<li style="font-weight: 400;" aria-level="1">Prevent recurrence of eczema: By identifying allergens, you can avoid exposure and reduce flare-ups.</li>
<li style="font-weight: 400;" aria-level="1">Reduce chronic skin conditions: It helps manage and alleviate chronic dermatological conditions.</li>
<li style="font-weight: 400;" aria-level="1">Ensure safe product choices: Provides confidence in selecting products and methods to avoid allergens properly.</li>
<li style="font-weight: 400;" aria-level="1">Avoid allergenic substances: Helps you steer clear of materials that could trigger allergic reactions.</li>
</ol>
Therefore, if you have unexplained skin problems, a history of chemical allergies, or a profession that exposes you to chemicals, you should consider undergoing a Patch Test or Prick Test for peace of mind and to prevent future skin issues. Don&#8217;t let skin problems turn your daily life into a nightmare. Consult a dermatologist to assess the suitability of the tests and receive proper treatment.

Contact dermatitis is a skin condition caused by exposure to external substances. It presents with symptoms such as itching, skin rashes, swelling, redness, and sometimes oozing of fluid.

Services

Article

About Us

Hospital locations

Patch Test for Eczema

Tel

Email

Services

Article

About Us

Hospital locations