Allergy Testing and Treatment in Varanasi: Skin Prick Test, Immunotherapy, and Long-Term Relief at Satkriti Hospital

By Dr. Manoj Kumar Gupta, MBBS, MS (ENT), Founder, Satkriti Hospital, Varanasi

Allergies are among the most underdiagnosed and undertreated conditions in India. Millions of people spend years managing symptoms with antihistamines, nasal sprays, and eye drops — treating the surface while the underlying cause goes untested and unaddressed. The sneezing that gets worse every monsoon, the blocked nose that returns every winter, the itchy eyes that appear when a particular tree is flowering — these are not inevitable inconveniences. They are immunological responses that can be identified precisely, and in many cases, permanently reduced through a structured treatment programme.

At Satkriti Hospital in Varanasi, the ENT and allergy team provides the full spectrum of allergy care: structured clinical assessment, validated diagnostic testing including Skin Prick Testing, and long-term management including allergen immunotherapy. This guide explains what allergy testing actually involves, who benefits from a formal evaluation, and what treatment options are available for patients across Varanasi and Purvanchal.

Understanding Allergic Disease: Why Symptoms Are Not Random

An allergy is a specific immune system response to a substance — an allergen — that is harmless to most people. In a person with allergic disease, the immune system misidentifies the allergen as a threat, produces Immunoglobulin E (IgE) antibodies against it, and on subsequent exposures, triggers an inflammatory cascade that produces symptoms.

The most common allergen categories in the Varanasi region include:

Aeroallergens (airborne allergens): House dust mites — microscopic organisms that live in bedding, upholstered furniture, and carpets — are the single most common allergen identified in our patient population. Mold spores (Alternaria, Aspergillus, Cladosporium) are prevalent particularly during the monsoon months. Tree pollen, grass pollen, and weed pollen create seasonal patterns that many patients can predict by calendar. Cockroach allergen is a major trigger in urban households.

Food allergens: Milk, eggs, wheat, peanuts, tree nuts, fish, and shellfish account for the majority of food allergies. In children, food allergy often presents alongside other atopic conditions. Food allergy evaluation in the ENT context is relevant when nasal symptoms, chronic ear fluid, or recurrent throat infections appear to fluctuate with dietary changes.

Occupational allergens: Flour dust (relevant for bakers and workers in grain processing), latex, chemical solvents, and animal dander are encountered in specific work environments.

What makes Varanasi’s allergy burden distinctive: The city’s geography and climate create specific allergy triggers. The Ganga riverside environment, high ambient humidity during monsoon, dense urban particulate load, and proximity to agricultural land in Purvanchal mean that patients here often present with polysensitisation — reactions to multiple allergen classes simultaneously. This makes empirical management (guessing the trigger and treating without testing) less reliable than a structured diagnostic approach.

Who Should Seek Allergy Testing?

Not every patient with occasional sneezing needs formal allergy evaluation. A clinical assessment first establishes who is likely to benefit.

Allergy testing is particularly valuable when:

• Nasal symptoms persist for more than three months per year, or are present year-round, without a clear infectious cause
• Symptoms appear to follow a seasonal pattern that repeats predictably across years
• Chronic sinusitis has not responded adequately to medical management, and allergy is suspected as a contributing factor
• Recurrent ear infections in children may be related to eustachian tube dysfunction driven by allergic rhinitis
• Asthma is present alongside nasal or eye symptoms — the “unified airway” model recognises that upper and lower airway allergy frequently co-exist and influence each other
• The patient is considering allergen immunotherapy (allergy shots or sublingual drops), which requires confirmed allergen identification before it can be prescribed
• Symptoms significantly affect quality of life, work, or school attendance despite standard antihistamine and nasal spray treatment

Children with recurrent ear fluid (otitis media with effusion), recurrent adenoid hypertrophy, or chronic nasal obstruction that limits sleep and school performance are particularly worth evaluating for an allergic component. At Satkriti Hospital, paediatric allergy assessment is integrated into the ENT paediatric programme.

Skin Prick Testing: The Gold Standard for Allergen Identification

Skin Prick Testing (SPT) is the most widely validated method for identifying IgE-mediated allergen sensitivity. It is fast, inexpensive relative to blood tests, and provides results within twenty minutes of testing.

How the Test Works

A small drop of each allergen extract is placed on the forearm or back. A sterile lancet is used to prick through the drop, introducing a tiny amount of the extract just below the skin surface. No injection is involved — the prick is superficial and most patients describe it as feeling like a light scratch.

Control solutions are always included: a positive control (histamine, which produces a known wheal) and a negative control (saline, which should produce no reaction). These controls validate that the patient’s skin is responding normally and that the test result reflects genuine allergen sensitivity rather than skin reactivity or drug interference.

After fifteen to twenty minutes, the skin is examined. Where the immune system recognises a specific allergen, it releases histamine locally, producing a wheal (raised, pale bump) and flare (surrounding redness). The diameter of the wheal is measured. A wheal of 3mm or more greater than the negative control is considered a positive result.

Standard Allergen Panel at Satkriti Hospital

The allergen panel used at Satkriti Hospital covers the clinically relevant triggers for the Varanasi and Purvanchal region:

House Dust Mites: Dermatophagoides pteronyssinus and Dermatophagoides farinae — the two most clinically significant mite species. Patients sensitive to dust mites typically experience symptoms year-round with worsening in cooler months when indoor exposure is greatest.

Molds: Alternaria, Aspergillus, Cladosporium, Penicillium. Mold sensitivity produces seasonal peaks during and after monsoon.

Pollens: Grass pollens (Cynodon, Sorghum), weed pollens (Parthenium hysterophorus — a significant allergen in northern India, known locally as gajar ghas, Chenopodium), and tree pollens appropriate for the regional flora.

Animal Danders: Cat and dog dander, relevant for households with pets.

Cockroach Allergen: Periplaneta americana — highly prevalent in urban households and a major contributor to perennial allergic rhinitis and asthma in Indian cities.

Foods: Selected food allergens when clinical history suggests food-triggered symptoms.

Before Your Skin Prick Test: What to Know

Antihistamines must be stopped before testing — they suppress the skin’s wheal-and-flare response and will cause false-negative results. The stopping period depends on the antihistamine:

• Cetirizine, loratadine, fexofenadine (standard antihistamines): stop at least five days before the test
• Chlorpheniramine (older antihistamine, often in over-the-counter cold preparations): stop at least three days before
• Hydroxyzine: stop at least seven days before
• Tricyclic antidepressants and certain antipsychotics: require discussion with the prescribing doctor — do not stop these without medical guidance

Nasal steroids, inhaled steroids, and montelukast do not need to be stopped. If you are unsure about a medication, call Satkriti Hospital before your appointment.

The test should not be performed during or immediately after an acute allergic reaction, severe asthma episode, or in pregnancy where a systemic reaction (however rare) would carry additional risk.

Blood Testing for Allergy: When It Is Used

Serum-specific IgE testing (also called RAST testing or ImmunoCAP testing) measures the level of IgE antibodies to specific allergens in the blood. It is used when:

• Skin testing is not possible because of severe eczema or psoriasis covering the test sites
• The patient is taking medications that cannot safely be stopped before testing
• The clinical history strongly suggests systemic anaphylaxis risk and an in-clinic skin reaction is not safe to trigger
• Results of skin testing require confirmation or expansion

Blood testing does not replace skin prick testing for routine allergy evaluation in most cases — it is less sensitive for many aeroallergens than SPT, is more expensive, and results take days rather than minutes. Satkriti Hospital uses blood testing as a complementary tool in selected patients, not as a routine first-line investigation.

Allergy Treatment Options: From Symptom Control to Long-Term Management

Step 1: Allergen Avoidance Measures

Once the triggering allergens are identified, specific avoidance measures significantly reduce the allergen load and improve symptom control even before any medication or immunotherapy.

House dust mite avoidance: Encase mattresses and pillows in mite-proof covers. Wash bed linen weekly in hot water (above 55 degrees C). Reduce indoor humidity below 50% — a simple hygrometer helps monitor this. Remove carpets and heavy drapes from the bedroom if possible. Vacuum with a HEPA-filter vacuum cleaner.

Mold avoidance: Fix water leaks and damp areas promptly. Use exhaust ventilation in bathrooms and kitchens. Avoid the use of evaporative coolers (desert coolers) which increase indoor humidity and promote mold growth.

Pollen avoidance: Keep windows closed during peak pollen periods (typically early morning). Change clothes after outdoor activity. Shower before bed during high-pollen seasons. Monitor local pollen counts — weather services now provide these.

Cockroach allergen reduction: Seal food in containers. Fix water sources. Professional pest control if infestation is significant.

Avoidance reduces allergen exposure but does not modify the underlying immune response. It works best as an adjunct to medication and immunotherapy, not a substitute.

Step 2: Pharmacotherapy — Medications That Control Symptoms

Several medication classes are effective for allergic rhinitis and related conditions:

Intranasal corticosteroids (INCS): The most effective single medication class for moderate to severe allergic rhinitis. Agents such as fluticasone, mometasone, and budesonide reduce nasal inflammation when used consistently. They are not decongestants — they work by reducing mucosal inflammation over days to weeks of regular use. They are safe for long-term use when prescribed at recommended doses.

Antihistamines: Second-generation antihistamines (cetirizine, loratadine, fexofenadine, bilastine) reduce sneezing, itching, and watery discharge. They are less effective for nasal obstruction. They are useful for as-needed and regular use.

Leukotriene receptor antagonists (montelukast): Particularly useful when allergic rhinitis coexists with asthma. Less effective as monotherapy for rhinitis than INCS.

Nasal antihistamines (azelastine, olopatadine): Faster onset than oral antihistamines when applied directly to the nasal mucosa. Useful as add-on therapy.

Decongestants: Pseudoephedrine (oral) and xylometazoline (nasal spray) provide rapid symptom relief but are not suitable for long-term use. Topical nasal decongestant sprays cause rebound congestion (rhinitis medicamentosa) when used for more than five to seven consecutive days.

Step 3: Allergen Immunotherapy — Treating the Cause, Not Just the Symptoms

Allergen immunotherapy (AIT) is the only treatment that modifies the underlying immune response to allergens. Rather than simply suppressing symptoms, it trains the immune system to tolerate the allergen — reducing sensitivity, decreasing medication requirements, and in some patients producing long-term remission that persists after treatment ends.

There are two delivery routes:

Subcutaneous Immunotherapy (SCIT) — Allergy Injections:

The patient receives injections of allergen extract under the skin at the outer part of the upper arm. The treatment begins with an updosing phase, in which the dose is gradually increased every one to two weeks until the maintenance dose is reached. The maintenance phase then continues with injections every four to six weeks for a total treatment period of three to five years.

SCIT is performed at Satkriti Hospital under supervised conditions, with a thirty-minute observation period after each injection. This allows prompt management of the rare but possible systemic reaction. Emergency medications including epinephrine are present at every injection session.

SCIT is the better-documented delivery method for aeroallergens including house dust mite, grass pollen, and cat dander. It is the only form of immunotherapy with a strong evidence base for insect venom allergy.

Sublingual Immunotherapy (SLIT) — Allergen Drops or Tablets:

Allergen extract is administered as drops under the tongue or as standardised tablets that dissolve sublingually. Most of the dose is taken at home. The first dose is given at the clinic with observation; subsequent doses are self-administered.

SLIT is particularly well-suited to patients who cannot attend frequent clinic appointments, for paediatric use, and for house dust mite and grass pollen sensitivity where standardised sublingual preparations are available. The evidence base for SLIT has strengthened considerably in the past decade, and for the main allergens with available standardised products it is now considered equivalent to SCIT.

Who is a candidate for immunotherapy?

• Confirmed IgE-mediated sensitivity to clinically relevant allergens
• Symptoms inadequately controlled by pharmacotherapy alone, or requiring high doses of medication for symptom control
• Patient willingness to commit to a multi-year treatment course
• No active severe or unstable asthma
• No contraindications (certain cardiovascular medications, severe immunological conditions)

The decision to begin immunotherapy is made jointly with the patient after a full discussion of the commitment involved, the realistic outcomes expected, and the available delivery options.

Allergic Rhinitis and Chronic Sinusitis: The Overlap

One of the most common clinical presentations at Satkriti Hospital’s ENT OPD is a patient with recurrent sinusitis who has had multiple courses of antibiotics, two or three sinus surgeries at other centres, and whose symptoms keep returning.

In many of these cases, the underlying driver is untreated allergic rhinitis. Chronic mucosal inflammation from ongoing allergen exposure swells the sinus ostia (the drainage openings), impairs mucociliary clearance, and sets the stage for repeated bacterial superinfection. Operating on this patient — with or without FESS — improves drainage anatomy but does not address the inflammatory driver. Without allergy management, the cycle repeats.

The integrated approach at Satkriti Hospital evaluates both dimensions: structural problems that may benefit from surgery, and inflammatory drivers that require medical and potentially immunotherapy management. FESS and allergy treatment are not alternatives — they are complementary, and for some patients both are necessary.

Paediatric Allergy at Satkriti Hospital

Children with allergic disease warrant special attention for several reasons. First, allergic rhinitis impairs sleep, and impaired sleep impairs cognitive development and school performance. Second, untreated allergic inflammation of the eustachian tube contributes to middle ear fluid accumulation (glue ear), which can produce a conductive hearing loss during critical years for language acquisition. Third, the “atopic march” — the progression from eczema in infancy, to food allergy in toddlerhood, to allergic rhinitis and asthma in later childhood — can sometimes be modified by early identification and treatment.

At Satkriti Hospital’s paediatric ENT programme, allergy evaluation is integrated with assessment for recurrent ear infections, adenoid hypertrophy, and snoring. When a child’s ENT problems are driven partly by allergic rhinitis, managing the allergy often reduces the frequency of ear infections and may reduce the need for surgical intervention such as grommet insertion or adenoidectomy.

Skin prick testing is well-tolerated in children from about five years of age. Sublingual immunotherapy is widely used in paediatric patients and avoids the need for injections.

Frequently Asked Questions

How many allergens are tested in a standard Skin Prick Test at Satkriti Hospital?

The standard panel covers the most clinically relevant allergens for the Varanasi and Purvanchal region — typically fifteen to twenty allergens including house dust mites, molds, regional pollens, cockroach, and animal danders. Food allergens are added when the clinical history suggests food sensitivity. The selection is based on the allergens actually present in the local environment, not a generic national panel.

Is Skin Prick Testing painful?

The prick is described by most patients as a light scratch, considerably milder than a standard injection. Children are understandably apprehensive but almost all complete the testing without difficulty once they experience the first prick. The more noticeable sensation is the itching of a positive reaction site, which resolves within thirty to sixty minutes.

How long does allergy testing take from consultation to result?

The initial consultation and clinical assessment takes approximately thirty minutes. If skin prick testing is performed at the same visit and all medications have been stopped appropriately beforehand, results are available within twenty minutes of testing. The full consultation including test interpretation is typically completed within ninety minutes.

Will immunotherapy completely cure my allergy?

Immunotherapy modifies the immune response and in many patients produces long-lasting improvement that continues after the treatment course ends. In clinical trials, well-executed SCIT for house dust mite allergen reduces symptom scores and medication use significantly and produces sustained improvement. However, “cure” in the strict sense — permanent elimination of all sensitivity — is not guaranteed. The realistic expectation is meaningful reduction in symptoms, reduced medication dependence, and for some patients the ability to tolerate previously triggering environments without significant reaction.

Can I take my allergy medications while receiving immunotherapy?

Yes. Medications including nasal steroids and antihistamines can be continued during immunotherapy. The injections or drops are not contraindicated by these medications. If a patient is taking an antihistamine on the day of an injection, the suppressive effect on any local skin reaction at the injection site is a minor issue; the clinically important observation period is for systemic reactions, which are not masked by standard antihistamines.

My symptoms are better in summer and worse in winter — does that mean it’s definitely dust mite allergy?

House dust mite allergy commonly follows this pattern because mite populations peak indoors in cooler, more humid months when windows are closed and bedding is used more heavily. However, other allergens also have seasonal patterns, and the history alone is not sufficient to identify the allergen with certainty. Skin prick testing confirms which specific allergens are driving symptoms.

For allergy testing, diagnosis, and treatment — including skin prick testing and allergen immunotherapy — at Satkriti Hospital in Varanasi, call +91 94542 19800 or visit satkritihospital.com. Patients from across Purvanchal, Bihar, and eastern UP are welcome.