Dr. Hina Altaf Dermatologist

Patch Test

patch test اختبار

A patch test اختبار is a type of allergy test that is used to identify the specific substances that may be causing an allergic reaction on a person’s skin. It involves applying small amounts of various substances, known as allergens, to the skin on the person’s back, typically using adhesive patches. Along with your medical history, allergy tests may be able to confirm whether a particular substance you touch, breathe or eat is causing symptoms.

Patch testing is often used to diagnose contact dermatitis, a type of skin inflammation that is caused by exposure to specific allergens or irritants. The test can help identify the specific substances that are triggering the reaction, which can help the person avoid those substances in the future and reduce their symptoms.

Patch test اختبار can detect delayed allergic reactions, which can take several days to develop.

Patch tests don’t use needles. Instead, allergens are applied to patches, which are then placed on your skin. During a patch test, your skin may be exposed to 20 to 30 extracts of substances that can cause contact dermatitis. These can include latex, medications, fragrances, preservatives, hair dyes, metals and resins.

The patches are usually left in place for 48-72 hours, during which time the person should avoid showering or bathing to prevent the patches from becoming wet. After the patches are removed, the skin is examined for any signs of a reaction, such as redness, swelling, or itching.

Common allergens that may be tested for include metals such as nickel or cobalt, fragrances, preservatives, and chemicals used in hair dyes and other personal care products. In some cases, the testing may also include substances that are specific to the person’s occupation or hobbies.

Patch testing is generally considered safe, but there is a risk of skin irritation or allergic reaction to the substances being tested. It should only be performed by a trained healthcare professional who can monitor the person’s reaction and provide appropriate treatment if necessary.

If you are experiencing symptoms of contact dermatitis, such as redness, itching, or rash, it’s important to seek medical attention to determine the underlying cause and develop an appropriate treatment plan.

Minimal Downtime

You can return to your daily routine immediately after

Immediate Results

Results within 24 to 48 hours, with full results in 30 days

Painless Procedure

Brief period of discomfort during the injection, similar to a pinch

Results That Last

Effects typically last for several months

A patch test is a diagnostic procedure used to identify allergens that may be causing allergic contact dermatitis. It involves applying small amounts of various substances (allergens) to patches, which are then placed on the skin and left in place for a specified period. The patches are then removed, and the skin is examined for any allergic reactions.
During a patch test, a series of patches containing different allergens are applied to the skin, typically on the back. These patches are left in place for around 48 hours. After this period, the patches are removed, and the skin is examined for any signs of an allergic reaction. Follow-up visits may be required to assess delayed reactions.
A patch test is done to identify specific substances that may be causing allergic contact dermatitis, a type of skin inflammation. It helps determine the exact allergens to which an individual may be allergic, allowing for targeted avoidance measures and appropriate treatment planning.
Patch tests include a standard set of common allergens, such as metals (e.g., nickel), fragrances, preservatives, rubber compounds, and various chemicals found in everyday products. Additionally, a customized patch test can be tailored to an individual's specific needs, taking into account their occupation or suspected allergens.
The results of a patch test are typically read and interpreted by a healthcare professional between 48 and 72 hours after the patches are removed. Delayed reactions may require additional visits for assessment. Once the results are available, your healthcare provider will discuss them with you, provide recommendations for allergen avoidance, and suggest appropriate treatments if necessary.
patch test اختبار

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Dr. Hinah Altaf’s clinic is currently at Gargash Hospital, 145 Umm Suqeim Street – Umm Al Sheif -Dubai.