Skin Prick Test in Kolkata: How It Works, Cost & What to Expect | Dr. Naren Pandey
By Dr. Naren Pandey | Allergist & Asthma Specialist, Kolkata
Are you suffering from repeated sneezing, skin rashes, itchy eyes, or breathing difficulty — but don’t know what’s causing it? The answer lies in one simple, accurate test: the Skin Prick Test (SPT).
At the Allergy Asthma Centre, Dr. Naren Pandey performs the Skin Prick Test daily for patients across Kolkata — helping them identify their exact allergen and start the right treatment. This complete guide explains what the Skin Prick Test is, how it is done, what to expect, and why it is the most important first step toward permanent allergy relief.
What Is a Skin Prick Test?
The Skin Prick Test — also known as the scratch test, skin scratch test, or allergy skin test — is the gold standard diagnostic test for allergy worldwide. It identifies which specific substances (allergens) your immune system is reacting to.
In simple terms: small amounts of common allergens are introduced into the skin, and the skin’s reaction tells us exactly what you are allergic to.
The test is:
- ✅ Quick — results in just 15–20 minutes
- ✅ Accurate — 85–95% sensitivity for inhalant allergens
- ✅ Affordable — most cost-effective allergy test available
- ✅ Safe — suitable for all ages including young children
- ✅ Comprehensive — tests 40+ allergens simultaneously
Why Is the Skin Prick Test Important?
Many allergy patients in Kolkata take antihistamines for years without knowing their exact trigger. This leads to:
- Incomplete and temporary symptom control
- Unnecessary dietary restrictions
- Delayed immunotherapy — the only permanent treatment
- Wasted money on ineffective medication
The Skin Prick Test changes everything — by identifying your exact allergen, Dr. Naren Pandey can create a targeted treatment plan that actually works.
What Does the Skin Prick Test Detect?
At Allergy Asthma Centre, the Skin Prick Test panel includes 40+ allergens across these categories:
Indoor/Environmental Allergens:
- House dust mites (Dermatophagoides pteronyssinus & farinae)
- Cockroach allergens — very common in Kolkata homes
- Mold and fungal spores (Aspergillus, Alternaria, Cladosporium)
- Pet dander — cat, dog, bird feathers
Outdoor/Seasonal Allergens:
- Tree pollen — common during March–May in Kolkata
- Grass pollen
- Weed pollen
- Outdoor mold spores
Food Allergens:
- Prawns and shellfish — most common in Bengali diet
- Fish — hilsa, rohu, catfish
- Cow’s milk and dairy
- Eggs
- Peanuts and tree nuts (cashew, almond, walnut)
- Wheat and gluten
- Soy
- Mustard — widely used in Bengali cooking
Other Allergens:
- Latex
- Insect venoms (bee, wasp)
- Drug allergens (selected cases)
How Is the Skin Prick Test Done? Step by Step
Step 1 — Preparation The forearm (or back in children) is cleaned with alcohol and marked with a pen to identify each allergen position.
Step 2 — Allergen Application Small drops of allergen extracts are placed on the skin at marked positions. A positive control (histamine) and negative control (saline) are also placed.
Step 3 — Pricking A small lancet is used to lightly prick the skin through each allergen drop. This is not an injection — the prick is superficial and causes minimal discomfort, similar to a light scratch.
Step 4 — Waiting The patient waits for 15–20 minutes while the skin reacts.
Step 5 — Reading Results Dr. Naren Pandey examines each prick site. A raised, red wheal (bump) at any site confirms sensitivity to that allergen.
Step 6 — Interpretation Results are interpreted alongside your clinical history and symptoms. A positive test alone does not always mean you are clinically allergic — expert interpretation is essential.
How to Read Skin Prick Test Results
| Wheal Size | Interpretation |
|---|---|
| < 3mm | Negative — not allergic |
| 3–5mm | Mild sensitivity |
| 5–10mm | Moderate allergy |
| > 10mm | Severe allergy |
Results are always compared to the positive control (histamine) and negative control (saline) to ensure accuracy.
Skin Prick Test vs Blood Allergy Test: Which Is Better?
| Feature | Skin Prick Test | Blood Allergy Test (IgE) |
|---|---|---|
| Accuracy | 85–95% | 75–85% |
| Results | 20 minutes | 1–3 days |
| Cost | Lower | Higher |
| Antihistamines | Must stop 5–7 days before | Can be done while on medication |
| Age | From 2 years | Any age |
| Allergens tested | 40+ simultaneously | Limited by cost |
| Pain | Minimal scratch | Blood draw |
| Best for | Inhalant + food allergy | When skin testing not possible |
Conclusion: Skin Prick Test is preferred as the first-line allergy test. Blood test is used when skin testing is not possible.
How to Prepare for Your Skin Prick Test
Stop these medications before the test:
| Medication | Stop how many days before |
|---|---|
| Antihistamines (cetirizine, loratadine) | 5–7 days |
| Hydroxyzine | 7 days |
| Tricyclic antidepressants | 14 days |
| Omalizumab | 6 months |
Continue these medications normally:
- Nasal corticosteroid sprays (Flonase, Nasonex)
- Inhaled corticosteroids (asthma inhalers)
- Blood pressure medications
- Antibiotics
On the day of the test:
- Eat normally — no fasting required
- Wear loose, short-sleeved clothing
- Avoid applying creams or lotions on the forearm
- Bring a list of all current medications
What Happens After the Skin Prick Test?
After the test, Dr. Naren Pandey discusses your results immediately and creates a personalised management plan:
1. Allergen Avoidance Plan Practical steps to reduce exposure to your identified allergen at home, work, and in your daily diet.
2. Medications Targeted antihistamines, nasal sprays, or inhalers based on your specific sensitisation pattern.
3. Allergy Immunotherapy If you are a suitable candidate, immunotherapy (allergy vaccine) can be started immediately after the Skin Prick Test confirms your allergen — providing permanent relief.
Read our complete guide: Immunotherapy in Kolkata
Is the Skin Prick Test Safe?
Yes — the Skin Prick Test is extremely safe when performed by an experienced allergist.
Common reactions (expected):
- Small red wheals at positive test sites — resolve within 30–60 minutes
- Mild itching at test sites — normal
Rare reactions:
- Systemic reactions — very rare with skin prick testing
- At Allergy Asthma Centre, emergency medication is always available
Contraindications:
- Severe eczema covering the test area — use blood test instead
- Recent anaphylaxis within 4 weeks
- Pregnancy — discuss with Dr. Naren Pandey
- Cannot stop antihistamines — use blood test instead
Skin Prick Test for Children in Kolkata
Children as young as 2–3 years can safely undergo the Skin Prick Test. At Allergy Asthma Centre, Dr. Naren Pandey uses a child-friendly approach:
- Age-appropriate allergen panels
- Gentle technique to minimise discomfort
- Results explained clearly to parents
- Immediate treatment plan for the child
Early testing in children is especially important because it:
- Identifies food allergies before they cause severe reactions
- Allows early immunotherapy — preventing rhinitis from becoming asthma
- Guides safe dietary choices for the child
Frequently Asked Questions
Q: How painful is the Skin Prick Test? A: Most patients describe it as a light scratch — similar to a fingernail scraping the skin. Children tolerate it well.
Q: How long does the test take? A: Total appointment time is about 45–60 minutes — including preparation, waiting, result reading, and consultation.
Q: Can I eat before the test? A: Yes — eat normally. Fasting is not required.
Q: Can I drive after the test? A: Yes — the Skin Prick Test does not cause sedation or impairment.
Q: Is one skin prick test enough? A: Usually yes. Repeat testing may be needed if symptoms change or new allergies are suspected.
Q: What if all tests are negative but I still have symptoms? A: Negative skin prick test with persistent symptoms may indicate non-allergic rhinitis, food intolerance, or other conditions. Dr. Naren Pandey will advise further investigation.
Book Your Skin Prick Test in Kolkata
For complete allergy testing information, visit our Best Allergy Test Center in Kolkata page.
Also read:
Watch: Skin Prick Test Explained by Dr. Naren Pandey
[Embed YouTube video: https://youtu.be/-iwKBSGm7cY]
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Don’t guess — get tested. Know your allergen. Start the right treatment. Get permanent relief.