What Is Allergic Rhinitis — and Why Mumbai Weather Makes It Worse

Allergic rhinitis — commonly called hay fever — is one of the most widespread chronic conditions in the world, affecting an estimated 400 million people globally. In India, prevalence in urban areas like Navi Mumbai can reach 20–30% of the adult population. Despite its prevalence, it remains significantly under-treated: many patients simply accept sneezing fits, blocked noses, and constant fatigue as an unavoidable part of daily life. They shouldn't.

What Causes It?

Allergic rhinitis occurs when the immune system overreacts to harmless airborne particles called allergens. After initial sensitisation, every subsequent exposure triggers mast cells in the nasal lining to release histamine — causing the classic symptoms of sneezing, runny nose, nasal congestion, and itchy eyes.

• House dust mites (Dermatophagoides pteronyssinus, D. farinae) — the most common allergen in urban India; thrive in mattresses, carpets, and upholstered furniture
• Cockroach allergens — highly prevalent in Indian cities; a major trigger often overlooked
• Alternaria and Aspergillus moulds — surge during monsoon season (June–September); spores are inhaled outdoors and indoors
• Grass and weed pollens — seasonal peaks in spring and post-monsoon
• Pet dander (cat and dog) — growing prevalence with increased urban pet ownership
• Particulate matter and diesel exhaust — traffic pollution does not cause allergy directly but amplifies allergic responses and primes the nasal mucosa

Why Is It So Bad in Panvel and Navi Mumbai?

The geographical location of Panvel creates a uniquely high allergen burden. The city sits at the junction of coastal humidity, industrial zones (JNPT, Rasayani), and significant green cover. This creates:

• Very high year-round dust mite loads due to coastal humidity (>70% RH encourages mite proliferation)
• Significant mould spore peaks during and immediately after monsoon (June–October)
• Pollen from native grasses and invasive species like Parthenium hysterophorus (congress grass) — a potent allergen
• Traffic pollution from NH-66 and industrial corridor that amplifies airway inflammation

Symptoms and Impact

Beyond the well-known runny nose and sneezing, allergic rhinitis has a significant impact on quality of life that is often underappreciated:

• Persistent nasal congestion — leads to mouth breathing, snoring, and disrupted sleep
• Post-nasal drip — mucus dripping to the throat causes chronic cough and hoarseness
• Itchy eyes, nose, palate, and ears
• Fatigue and poor concentration — 'brain fog' from disturbed sleep and inflammatory cytokines
• Worsening of asthma — up to 80% of asthma patients also have allergic rhinitis; treating rhinitis reduces asthma exacerbations
• School performance and work productivity losses

How Is It Diagnosed?

A thorough allergy history is the most important diagnostic tool. Dr. Ravikant Zala will ask about the pattern of your symptoms (perennial vs seasonal), aggravating factors, occupational exposure, and family history. Investigation includes skin prick testing (SPT) with a panel of regionally relevant allergens — this is the fastest and most accurate method to identify sensitisation. Specific IgE blood tests (ImmunoCAP) are used when SPT is contraindicated.

Treatment — More Than Just Antihistamines

Modern management of allergic rhinitis follows a stepped protocol. Antihistamines are a starting point, not the end point:

• Avoidance measures — encasing mattresses; HEPA filters; reducing carpet use; dehumidifiers to drop mite-friendly humidity below 50%
• Intranasal corticosteroid (INCS) sprays — the most effective class for persistent rhinitis; reduces inflammation rather than masking it
• Second-generation non-sedating antihistamines for symptom relief
• Combination INCS + intranasal antihistamine (Dymista-type) for moderate-severe disease
• Allergen Immunotherapy (AIT) — the only treatment that modifies the underlying allergy. Effective for dust mites, cockroach, and pollens. Three-year courses reduce symptoms significantly and prevent new sensitisations from developing

If you have been living with a blocked, runny, or constantly itchy nose — especially if it is affecting your sleep or daily function — it is worth a consultation. Allergic rhinitis is highly treatable and the right care makes a measurable difference to quality of life.