If two of these three apply to you — lasting more than two weeks, clear watery discharge, and itching — allergic rhinitis is the most likely explanation.
What Is Allergic Rhinitis?
Allergic rhinitis is inflammation of the nasal lining caused by an IgE-mediated immune response to inhaled allergens. When a sensitised person encounters their specific allergen, mast cells in the nasal mucosa release histamine and other inflammatory mediators, producing the characteristic symptoms within minutes.
It affects approximately 20–30% of the Indian population, with higher prevalence in urban areas and in individuals with a family history of allergy, asthma, or eczema (the “atopic triad”).
Types: Seasonal vs Perennial
Seasonal allergic rhinitis — symptoms occur during specific months of the year, typically correlating with the pollen season of specific trees, grasses, or weeds. In India, pollen seasons vary significantly by region and plant species. Common triggers include Parthenium hysterophorus (congress grass), prosopis (mesquite), and various grass pollens.
Perennial allergic rhinitis — symptoms occur year-round, typically triggered by indoor allergens: house dust mites, cockroach allergens, pet dander (cat and dog), and mould spores.
Monsoon pattern — in India, the monsoon season is a particularly common trigger period, driven by mould proliferation in humid conditions and the growth of specific allergenic plants. Many patients who describe their condition as a “monsoon cold” actually have seasonal allergic rhinitis.
Common Triggers in India
House dust mites — the most common year-round trigger globally. These microscopic organisms live in mattresses, pillows, carpets, and soft furnishings. They thrive in warm, humid conditions — making much of India highly conducive to mite proliferation.
Cockroach allergens — cockroach faecal material and body parts are potent allergens. Cockroach sensitivity is particularly relevant in urban Indian settings.
Parthenium — congress grass (Parthenium hysterophorus), an invasive weed now widespread across India, is one of the most significant sources of allergic sensitisation. It is highly prevalent in roadsides, fields, and urban open spaces.
Pet dander — cat and dog allergens; increasing relevance as pet ownership rises in Indian urban households.
Mould — Aspergillus, Alternaria, and Cladosporium species proliferate during the monsoon season and in damp environments.
Symptoms
The classic symptom complex of allergic rhinitis includes:
- Sneezing (often in clusters)
- Clear, watery nasal discharge (rhinorrhoea)
- Nasal obstruction/congestion
- Nasal itch
- Post-nasal drip (mucus dripping down the back of the throat, causing a tickling sensation and chronic throat clearing)
- Eye symptoms — itching, redness, tearing (allergic conjunctivitis) — in approximately 50–70% of patients
- Palatal itch
- Ear fullness or itch
With long-standing, poorly controlled rhinitis, patients also develop secondary effects: disrupted sleep, daytime fatigue, reduced concentration, impaired school or work performance, and worsening of coexisting asthma.
The Asthma Connection
Allergic rhinitis and asthma are linked — not just by shared allergic mechanisms, but by direct anatomical continuity of the respiratory mucosa. Poorly controlled rhinitis is an independent risk factor for the development of asthma, and in patients with established asthma, uncontrolled rhinitis worsens asthma control.
This “united airways” concept is why treatment of allergic rhinitis is not only about nasal symptoms — it is part of a unified respiratory management strategy.
What Helps: Evidence-Based Treatment
1. Intranasal Corticosteroids (First-Line)
Intranasal steroid sprays — fluticasone, mometasone, budesonide, beclomethasone — are the most effective single treatment for allergic rhinitis. They reduce nasal congestion, discharge, sneezing, and itching more effectively than antihistamines, particularly for nasal blockage.
Key points for patients:
– It takes 1–2 weeks of regular use to reach full effectiveness. Do not judge it on the first two days.
– The spray is used inside the nose and acts locally — the systemic steroid absorption is minimal at standard doses.
– Technique matters: aim the spray toward the outer wall of the nose, not the nasal septum.
2. Antihistamines
Non-sedating antihistamines (cetirizine, loratadine, fexofenadine, levocetirizine, bilastine) are effective for sneezing, runny nose, and itch, but less effective for nasal congestion.
Older antihistamines (chlorpheniramine — Piriton) are sedating and should not be used when driving or operating machinery. Non-sedating options are preferred for daytime use.
3. Nasal Saline Irrigation
Saline rinses (using a neti pot or saline spray) reduce allergen load, clear mucus, and improve nasal airway patency. They are safe, inexpensive, and a useful adjunct to medical treatment.
4. Allergen Avoidance
Where the allergen is identifiable, avoidance reduces exposure and symptom burden:
– For dust mites: mattress and pillow encasements, frequent washing of bedding in hot water (60°C), reducing carpet areas
– For pets: keeping pets out of bedrooms and off furniture, regular vacuuming with HEPA filters
– For moulds: reducing indoor humidity, addressing water leaks, removing mould growth from walls
– For Parthenium: avoiding open fields and roadsides during pollen season, using a mask outdoors when pollen counts are high
5. Allergen Immunotherapy (Desensitisation)
For patients with persistent, poorly controlled rhinitis despite medication and avoidance, allergen immunotherapy (AIT) offers a disease-modifying option. It involves gradually exposing the immune system to increasing doses of the allergen, retraining the immune response to tolerate it.
Available as subcutaneous injections (SCIT) or sublingual drops/tablets (SLIT). Treatment duration is typically 3–5 years. It is the only treatment that addresses the underlying cause rather than managing symptoms.
AIT is available at immunology/allergy centres in India including NIMS Hyderabad, AIIMS, and private allergy centres in most major cities.
When to See a Specialist
Consider specialist review if:
– Symptoms persist year-round or have a clear seasonal pattern lasting months
– Symptoms disrupt sleep or daily function despite over-the-counter antihistamines
– You also have asthma or eczema
– You wish to identify your specific allergens through allergy testing
– You are considering immunotherapy
Frequently Asked Questions
Is allergic rhinitis the same as sinusitis?
No, though they can coexist. Allergic rhinitis is inflammation of the nasal lining. Sinusitis (rhinosinusitis) is inflammation of the paranasal sinuses, usually caused by infection or as a complication of untreated rhinitis. Allergic rhinitis predisposes to sinusitis by impairing sinus drainage and immune defence.
Can I take antihistamines every day?
Non-sedating antihistamines are safe for daily use. However, if you require daily antihistamines for prolonged periods, you should be properly assessed by an allergist — allergen identification and intranasal steroids may control your symptoms better and with less ongoing medication.
Is it safe to use nasal steroid sprays long-term?
Yes. Intranasal corticosteroids at recommended doses have negligible systemic absorption. They do not cause the systemic side effects associated with oral steroids. Long-term use (years) is considered safe.
Do children outgrow allergic rhinitis?
Some do and some do not. Sensitisation patterns can change over time. Allergen immunotherapy in childhood may reduce the risk of developing new allergen sensitisations and the progression to asthma.
Is Parthenium common in Hyderabad?
Yes. Parthenium hysterophorus is extremely prevalent across Telangana and the rest of India. It is a significant contributor to the pollen allergy burden in Hyderabad and surrounding areas, particularly from post-monsoon through winter months.
This article is for educational purposes. It does not constitute medical advice and does not replace consultation with a qualified specialist. Dr. Keerthi Vardhan, MD (Internal Medicine), DM (Clinical Immunology & Rheumatology), Assistant Professor, NIMS Hospital, Hyderabad.