2 doctors in India — verified profiles, ratings, fees and clinic or online consultation.
MD - Dermatogist and Cosmeto- Venereologist
.png){kind=small}
Dermatology
Cosmetologist
Dr Pooja K is a Dermatologist and Cosmetologist in Kelambakkam. She has completed MD in Dermatology, Venereology and Leprosy. She specializes in Skin, Hair,…
Dr. Anshu Agrawal- Gynecologist
Obstetricians and Gynecologists
Gynecology
Passionate obstetrician and gynecologist, experienced with 2500+ surgeries and still counting every day. Skilled in non surgical treatments, gynaec cosmetolo…
Showing 1–2 of 2
An allergy scratch test, also known as a skin prick or puncture test, is a common diagnostic procedure used to identify substances that cause allergic reactions (allergens). During this test, small amounts of suspected allergens are placed on the skin and gently scratched or pricked to observe any reaction.
If a person is allergic to a substance, the skin will react by developing redness, swelling, or a small raised bump (called a wheal) at the test site.
This test is widely used to diagnose allergies related to pollen, dust mites, pet dander, mold, and certain foods. It is quick, safe, and provides results within minutes.
● Identifies specific allergens causing symptoms
● Helps diagnose conditions like allergic rhinitis, asthma, or eczema
● Provides quick and reliable results
● Guides treatment plans and allergy management
● Helps prevent exposure to triggers
● Supports decisions for immunotherapy (allergy shots)
● Individuals with frequent sneezing, runny nose, or nasal congestion
● People with skin rashes or itching
● Patients with suspected food allergies
● Individuals with asthma or breathing difficulties
● People with unexplained allergic reactions
● Patients needing confirmation of allergy triggers
1. Skin Prick (Scratch) Test
The most common test where allergens are applied to the skin and lightly pricked to check for immediate reactions.
2. Intradermal Test
A small amount of allergen is injected under the skin, usually for more sensitive testing like drug or insect allergies.
3. Patch Test
Allergens are applied using patches to detect delayed allergic reactions, often for skin conditions like contact dermatitis.
● Patient’s skin (usually forearm or back) is cleaned
● Small drops of different allergens are placed on the skin
● Skin is gently scratched or pricked under each drop
● Multiple allergens can be tested at the same time
● Patient waits for about 15–20 minutes
● Doctor observes for redness, swelling, or bumps
● Results are recorded and analyzed
The entire test usually takes about 20 to 40 minutes, with immediate results available.
There is no recovery time needed after an allergy scratch test. Patients can resume normal activities immediately.
Some itching or mild swelling may occur at the test site, but it usually disappears within a few hours. Applying soothing creams or taking antihistamines may help reduce discomfort if needed.
Patients are advised to follow their doctor’s recommendations based on the test results, including avoiding allergens and starting appropriate treatment.
● Mild itching or irritation
● Temporary redness or swelling
● Rare risk of severe allergic reaction (anaphylaxis)
● False positive or negative results
● Discomfort during the test
Although rare, the test is performed under medical supervision to manage any unexpected reactions safely.
The allergy scratch test provides immediate results and is widely used due to its simplicity and accuracy.
Compared to blood tests, it is faster and more sensitive in detecting allergies. However, blood tests may be preferred for patients with severe skin conditions or high risk of reactions.
Patch tests, on the other hand, are used for delayed reactions, while scratch tests are ideal for identifying immediate allergic responses.
It is used to identify substances that cause allergic reactions by observing skin responses to specific allergens.
No, it causes only mild discomfort. The scratches are very small and usually do not cause bleeding.
The procedure takes about 20 to 40 minutes, including waiting time for results.
Doctors can test multiple allergens (sometimes up to 50) in a single session.
Yes, it is generally safe and performed under medical supervision to handle any reactions.
You may be asked to stop antihistamines a few days before the test, as they can affect results.
A positive result shows a raised, red bump at the test site, indicating sensitivity to that allergen.
