Allergic Rhinitis

Introduction

Allergic rhinitis is one of the most common long-term conditions in the world. If you have been told that your blocked nose, sneezing fits, runny nose, itchy eyes, or constant throat clearing are caused by allergic rhinitis, you are not alone — estimates suggest that hundreds of millions of people live with it globally, and rates are rising, particularly in urban areas.

This article is written for readers who already have a diagnosis or are being investigated for allergic rhinitis and want to understand what comes next. It explains what the condition is, what causes it, how it is diagnosed, the main treatment options including medications and allergen immunotherapy, and how to manage life with it over the long term. It also covers allergic rhinitis in children, common complications such as sinus infections and links to asthma, and answers questions that patients frequently ask.

Allergic rhinitis cannot always be cured, but in most people it can be controlled well enough that it stops interfering with sleep, work, school, and daily life. The right combination of approaches depends on the specific triggers, the severity of symptoms, the person’s age, and other health conditions — decisions that are made together with the treating doctor.

What Is Allergic Rhinitis?

Allergic rhinitis — sometimes called hay fever — is an inflammation of the lining of the nose that happens when the immune system reacts to a harmless substance in the environment as if it were dangerous. The substance that triggers the reaction is called an allergen. Common allergens include pollen, house dust mites, mould spores, cockroach particles, and the dander of animals such as cats and dogs.

When an allergen enters the nose of someone who is sensitised, the immune system releases chemicals such as histamine. These chemicals cause the blood vessels in the nasal lining to swell and the glands to produce more mucus. The result is the familiar pattern of sneezing, a runny or blocked nose, an itchy nose, and itchy or watery eyes.

Allergic rhinitis is a chronic condition, meaning it tends to come and go over years rather than resolve in a few days like a cold. It is not contagious. It is not caused by infection. It often runs in families and frequently appears alongside other allergic conditions such as asthma, eczema (atopic dermatitis), and food allergy — a tendency known as atopy.

Types of Allergic Rhinitis

Allergic rhinitis is classified in two main ways: by the timing of symptoms and by their severity. Modern guidelines, including those from the ARIA (Allergic Rhinitis and its Impact on Asthma) initiative, combine both descriptions to guide treatment.

By timing

• Seasonal allergic rhinitis: Symptoms appear at certain times of the year, usually in response to airborne pollens from trees, grasses, or weeds. In many regions this is referred to as hay fever.
• Perennial allergic rhinitis: Symptoms occur throughout the year, generally due to indoor allergens such as house dust mites, mould, cockroaches, or pets.
• Episodic allergic rhinitis: Symptoms appear only with occasional exposure to a specific allergen — for example, when visiting a household with a cat.

By severity and persistence (ARIA classification)

• Intermittent: Symptoms occur for fewer than four days a week, or for fewer than four consecutive weeks.
• Persistent: Symptoms occur for more than four days a week and for more than four consecutive weeks.
• Mild: Sleep, daily activities, work, school, and overall comfort are not significantly affected.
• Moderate to severe: One or more of those areas is significantly affected.

This classification matters because the treatment approach — particularly whether to begin daily nasal steroid sprays or to consider immunotherapy — depends on how persistent and how severe the symptoms are.

Local allergic rhinitis

Some people have all the symptoms of allergic rhinitis but standard allergy tests (skin prick or blood IgE) come back negative. In a portion of these cases, the allergic reaction is happening only inside the nose — a condition called local allergic rhinitis. It is increasingly recognised but requires specialised testing to confirm.

Non-allergic rhinitis (for comparison)

Not every chronically runny or blocked nose is allergic. Non-allergic rhinitis can be triggered by temperature changes, strong smells, certain foods, hormonal shifts, or medication side effects. The treatment approach is different, which is why an accurate diagnosis matters.

Causes and Risk Factors

The underlying cause of allergic rhinitis is an immune response in which the body produces a specific antibody — immunoglobulin E (IgE) — against an otherwise harmless allergen. On repeat exposure, this IgE triggers the release of inflammatory chemicals in the nasal lining.

Common triggers

• Pollens: from trees (often early in the year), grasses (later spring and summer), and weeds (late summer and autumn). In tropical regions, pollen seasons can be less predictable.
• House dust mites: microscopic creatures that live in bedding, carpets, soft furnishings, and stuffed toys. They are one of the most common year-round triggers.
• Mould spores: indoors (damp bathrooms, basements, kitchens) and outdoors (decaying leaves, soil).
• Animal dander: tiny flakes of skin from cats, dogs, rabbits, and other furred or feathered pets.
• Cockroach particles: a significant indoor trigger in many urban environments.
• Occupational allergens: flour, latex, wood dust, laboratory animals, and certain chemicals.

Risk factors

• A family history of allergic conditions (allergic rhinitis, asthma, eczema, food allergy)
• Personal history of other allergic conditions
• Early-life exposure to tobacco smoke
• Air pollution, including traffic-related pollutants
• Living in urban environments
• Occupational exposures

Allergic rhinitis often appears in childhood or adolescence but can develop at any age, including for the first time in adults. Some people find that their pattern of triggers changes over the years — new sensitivities can appear and older ones can become less troublesome.

Signs and Symptoms

For a reader who already has a diagnosis, this section serves as a reference for recognising flares, identifying when symptoms are worsening, and being aware of features that may signal a complication.

Typical symptoms

• Repeated bouts of sneezing, often in clusters
• A clear, watery runny nose (rhinorrhoea)
• Nasal blockage or congestion, often worse at night or on waking
• An itchy nose, often with frequent rubbing (the “allergic salute” in children)
• Itchy, red, or watery eyes (allergic conjunctivitis often accompanies allergic rhinitis)
• An itchy throat or ears
• Postnasal drip causing throat clearing or cough
• Reduced sense of smell and taste
• Disturbed sleep, snoring, and daytime tiredness

Features that may suggest a complication or another diagnosis

• Thick yellow or green nasal discharge persisting for more than a week or two, with facial pain or fever — may suggest sinusitis
• One-sided nasal blockage that does not switch sides — warrants medical review
• Nosebleeds that are frequent or severe
• New wheezing, breathlessness, or chest tightness — may suggest co-existing asthma
• Loss of smell that does not improve with usual treatment
• Persistent facial pain or pressure

Any of these should prompt a conversation with the treating doctor rather than self-management.

Diagnosis

The diagnosis of allergic rhinitis is usually clinical — meaning the doctor reaches it from the history and examination — and confirmed when needed with allergy testing. There is no single test that proves allergic rhinitis; rather, the picture is built from several pieces.

Medical history

The doctor will typically ask about the pattern, duration, and timing of symptoms; suspected triggers; home and work environment; pets; family history of allergy and asthma; and how the symptoms affect sleep, work, and quality of life.

Physical examination

Examination of the nose may show a pale, swollen lining and clear secretions. The eyes, throat, and ears are checked. The doctor will listen for any wheezing that may suggest co-existing asthma.

Allergy testing

Testing is not always required for a confident diagnosis but is helpful when triggers are unclear or when allergen immunotherapy is being considered.

• Skin prick testing: small drops of allergen extracts are placed on the forearm and the skin is gently pricked. A raised, itchy bump (wheal) at the site within about 15 minutes indicates sensitisation. It is quick, well tolerated, and inexpensive.
• Specific IgE blood tests: a blood sample is tested for IgE antibodies against particular allergens. Useful when skin testing is not possible — for example, when the patient has severe eczema, cannot stop antihistamines, or has had previous severe allergic reactions.

A positive test only confirms sensitisation. The clinical relevance — whether that allergen is actually causing symptoms — depends on matching the test result with the history.

Nasal endoscopy and imaging

An ENT specialist may use a thin flexible camera (nasal endoscope) to look inside the nose, particularly if there is one-sided blockage, suspected nasal polyps, or possible sinus disease. CT imaging of the sinuses may be requested when complications are suspected or when surgery is being considered.

Tests for related conditions

Because allergic rhinitis often coexists with asthma, lung function testing (spirometry) may be requested when respiratory symptoms are present. Eye involvement may prompt a review by an eye specialist.

Treatment and Management

Treatment of allergic rhinitis is built around four pillars: avoiding triggers where reasonable, medications to control inflammation and symptoms, allergen immunotherapy when appropriate, and care for related conditions such as asthma and sinusitis. International guidelines — from ARIA, AAAAI, EAACI, and AAO-HNS — broadly agree on the principles, even if the details of choice depend on the individual.

Allergen avoidance and environmental control

Completely avoiding airborne allergens is rarely possible, but reducing exposure can reduce the medication burden. Measures depend on the trigger:

• House dust mites: mite-proof covers for mattresses and pillows; washing bedding weekly at hot temperatures; reducing soft furnishings and stuffed toys in the bedroom; using a vacuum cleaner with a high-efficiency filter.
• Pollen: keeping windows closed during high-pollen periods; showering and changing clothes after being outdoors; checking local pollen forecasts; wearing wraparound sunglasses outside.
• Mould: repairing leaks; reducing indoor humidity; cleaning damp areas regularly.
• Pets: keeping pets out of the bedroom; regular bathing of the pet; air filtration. Removing the pet is the most effective measure but is often emotionally difficult and is a personal decision.
• Cockroaches: integrated pest management; sealing food; addressing entry points.
• Smoke and air pollution: avoiding tobacco smoke; using indoor air filtration during high-pollution periods.

Evidence for single avoidance measures is mixed; combined measures within a multi-pronged approach are generally more effective than any one step alone.

Saline nasal irrigation

Rinsing the nasal passages with a saltwater solution — using a squeeze bottle, neti pot, or similar device — helps clear allergens, mucus, and inflammatory material. It is simple, low-risk when prepared with clean water and the correct salt concentration, and recommended by major guidelines as an adjunct to other treatments.

Medications

Several classes of medication are used. The choice and combination depend on which symptoms dominate, how persistent they are, age, other health conditions, and pregnancy status.

• Intranasal corticosteroid sprays: Major guidelines describe these as the most effective single class of medication for moderate-to-severe or persistent allergic rhinitis. They reduce inflammation in the nasal lining and improve blockage, sneezing, runny nose, and itch. They need to be used daily for one to two weeks to reach full effect. Correct spray technique — aiming away from the nasal septum — reduces side effects such as dryness and minor nosebleeds.
• Oral antihistamines (second-generation): Tablets such as cetirizine, levocetirizine, loratadine, desloratadine, fexofenadine, and bilastine reduce sneezing, runny nose, itch, and eye symptoms. Second-generation antihistamines are preferred over older sedating ones because they cause less drowsiness.
• Intranasal antihistamine sprays: Useful when symptoms persist despite tablets, and act faster than oral options. Combined intranasal antihistamine plus steroid sprays are an option for moderate-to-severe disease.
• Leukotriene receptor antagonists: Tablets such as montelukast may be considered in selected patients, particularly when asthma coexists, although guidelines generally place them below intranasal steroids in priority. Patients should be aware of warnings regarding mood and sleep changes with montelukast.
• Decongestant sprays: Sprays containing oxymetazoline or xylometazoline relieve blockage quickly but should be used only for a few days at a time. Using them longer can cause rebound congestion (rhinitis medicamentosa) that is difficult to reverse.
• Oral decongestants: May help short-term but are not suitable for people with high blood pressure, heart disease, or certain other conditions.
• Short courses of oral corticosteroids: Occasionally used for severe flares unresponsive to other treatments. They are not used long-term because of side effects, and depot (long-acting injection) steroids are not recommended by current guidelines.
• Eye drops: Antihistamine or mast-cell-stabiliser eye drops help when itchy, watery eyes are prominent.

The combination is tailored to the individual. Many people do well with daily intranasal corticosteroid spray and an as-needed oral antihistamine; others need step-up combinations.

Allergen immunotherapy

Allergen immunotherapy aims to change the underlying immune response, rather than just suppress symptoms. By exposing the body to gradually increasing doses of the offending allergen, the immune system becomes less reactive over time. It is the only treatment that can produce long-term changes in the disease, with effects that may persist after the course is finished.

Immunotherapy is considered by allergy specialists when:

• Symptoms are moderate to severe
• Specific allergens have been confirmed by testing and match the clinical history
• Medications and avoidance have not given adequate control, or the patient prefers to address the underlying cause
• Asthma is well controlled (uncontrolled asthma is a safety concern)

There are two main delivery methods:

• Subcutaneous immunotherapy (SCIT, “allergy shots”): regular injections of allergen extract, typically given in a clinic with observation afterwards because of the small risk of allergic reaction. Treatment usually lasts three to five years.
• Sublingual immunotherapy (SLIT): drops or tablets placed under the tongue daily. The first dose is usually taken under medical supervision; subsequent doses are taken at home. Safety profile is generally favourable, though local reactions in the mouth are common in the early weeks.

The choice depends on the specific allergens, availability of standardised extracts, the patient’s ability to attend appointments, and clinical judgement.

Biologic therapy

For a small group of patients with severe disease — particularly when allergic rhinitis is associated with severe asthma or nasal polyps — injectable biologic medications that target specific immune pathways may be prescribed. This is a specialist decision.

Surgery

Surgery does not treat the allergy itself but may help when structural problems are contributing to nasal blockage:

• Turbinate reduction: shrinks the swollen lower turbinates to improve airflow
• Septoplasty: straightens a deviated septum
• Functional endoscopic sinus surgery (FESS): for associated chronic sinusitis or nasal polyps

Surgery is considered only after medical treatment has been optimised and is part of a broader management plan, not a stand-alone solution.

Lifestyle and Self-Management

Day-to-day habits play a major role in keeping allergic rhinitis under control. Most patients build a personal routine that combines a few of the following:

• Using prescribed nasal sprays daily, even on good days, during the active season — they work by preventing inflammation, not just treating it once present
• Learning and using correct nasal spray technique
• Performing saline nasal rinses regularly, especially after high-allergen exposure
• Tracking symptoms in a simple diary or app to identify triggers and assess response
• Adjusting outdoor activities during high-pollen periods, particularly mid-morning and early evening when many pollens peak
• Showering and changing clothes after coming indoors during pollen season
• Keeping the bedroom as allergen-light as possible — the bedroom is where most people spend the longest single block of time
• Avoiding tobacco smoke and limiting exposure to strong fumes or air pollution
• Treating co-existing asthma carefully, as poor rhinitis control often worsens asthma and vice versa
• Carrying medications when travelling, and being aware of changing allergens in new environments

Patients often find that they need more aggressive treatment during certain seasons or life circumstances and less during others. A flexible plan, agreed with the doctor, works better than rigid year-round dosing for many people.

Monitoring and Follow-up

Allergic rhinitis is not usually monitored with regular tests in the way that, for example, diabetes is. Monitoring is symptom-based:

• Are symptoms controlled on the current plan?
• Is sleep undisturbed?
• Are work, school, and daily activities unaffected?
• Are medications being tolerated?
• Has there been any change in suspected triggers, environment, or co-existing conditions?

Validated questionnaires such as the Rhinoconjunctivitis Quality of Life Questionnaire or simple visual scales are sometimes used in clinic to track progress. For patients on immunotherapy, follow-up is more structured — with scheduled appointments and safety monitoring.

Complications

Allergic rhinitis is often dismissed as a minor nuisance, but uncontrolled disease can lead to several complications and is associated with a number of related conditions.

• Sinusitis: Chronic inflammation can obstruct the sinus openings and lead to recurrent or chronic sinus infections.
• Nasal polyps: Soft, non-cancerous growths in the nose, more common with long-standing inflammation, particularly when combined with asthma or aspirin sensitivity.
• Middle ear problems: Especially in children, congestion can affect the Eustachian tube, contributing to fluid behind the eardrum (otitis media with effusion) and hearing problems.
• Sleep disruption: Persistent congestion can cause snoring, mouth breathing, and disturbed sleep, with knock-on effects on energy, concentration, and mood.
• Asthma: Allergic rhinitis and asthma share underlying inflammation. Poor rhinitis control is associated with poorer asthma control; treating one often helps the other.
• Allergic conjunctivitis: Eye involvement is common and may need its own treatment.
• Effects on learning and work: Daytime tiredness, reduced concentration, and side effects of older sedating antihistamines can affect school performance and productivity.
• Dental and facial changes in children: Long-term mouth breathing in childhood has been linked to certain dental and facial growth patterns.

These complications are reasons why structured, ongoing treatment is recommended for persistent or severe disease, rather than only treating flares.

Living with Allergic Rhinitis

Most people with allergic rhinitis live full, active lives with their condition well-controlled. Some practical themes come up repeatedly:

• Plan ahead for seasons. Many patients start daily intranasal steroid spray a couple of weeks before their known pollen season, on the advice of their doctor, to prevent symptoms from building up.
• Travel: Allergen patterns change with geography. People who feel well in one place may flare in another. Carrying a written summary of medications and an action plan helps when seeing new clinicians.
• Pregnancy: Allergic rhinitis can worsen, improve, or stay the same in pregnancy. Some medications are preferred over others during pregnancy and breastfeeding; this is decided with the treating doctor.
• Exercise: Outdoor exercise is fine for most people but may be limited during peak pollen times or high air pollution.
• Mental health: Chronic congestion, poor sleep, and constant symptoms can contribute to low mood and irritability. Effective control of the rhinitis often improves these.
• Work: Occupational allergens are a common but under-recognised cause of adult-onset rhinitis. If symptoms are clearly worse at work and better on holidays, this should be discussed with the doctor.

Allergic Rhinitis in Children

Allergic rhinitis often begins in childhood and is one of the most common chronic conditions among school-age children. Recognising and treating it well matters because of its effect on sleep, learning, behaviour, and on co-existing conditions such as asthma and ear problems.

Presentation in children

Children may not describe their symptoms clearly. Parents may notice:

• Frequent nose-rubbing or the “allergic salute” — pushing the palm up against the tip of the nose
• A horizontal crease across the lower nose from repeated rubbing
• Mouth breathing, snoring, and restless sleep
• Dark circles under the eyes (“allergic shiners”)
• Frequent throat clearing or coughing, particularly at night
• Recurrent ear infections or hearing difficulty
• Reduced school performance or concentration

Diagnosis and treatment

Diagnosis is similar to adults — history, examination, and allergy testing where useful. Both skin prick and specific IgE blood tests can be used in children.

Treatment principles are also similar, with some adjustments:

• Saline nasal irrigation is well tolerated by many children and is a good first step
• Intranasal corticosteroid sprays are widely used in children, with formulations and dosing adjusted for age
• Second-generation antihistamines are preferred over sedating ones, which can affect learning and behaviour
• Allergen immunotherapy is considered in older children and adolescents with confirmed allergies, particularly when there is a concern about progression to asthma
• Avoidance measures at home and school can make a meaningful difference

School and daily life

Talking with the school nurse or teacher about the child’s diagnosis, medications, and any restrictions during high-pollen periods helps. Children who breathe through their mouth at night because of nasal blockage may benefit from an ENT review to check for enlarged adenoids, which is a common contributor in this age group.

Prevention of Progression and Complications

Allergic rhinitis itself cannot always be prevented, but good control reduces the risk of complications and may influence the course of related conditions. Steps that have been associated with better long-term outcomes include:

• Early and consistent treatment of moderate-to-severe disease rather than waiting for severe flares
• Treating co-existing asthma and eczema together with the rhinitis
• Avoiding tobacco smoke, including second-hand smoke around children
• Considering allergen immunotherapy in suitable patients — studies suggest it may reduce the risk of developing new sensitivities and, in children, may reduce the risk of progression from allergic rhinitis to asthma
• Treating sinus and ear complications promptly

When to Seek Urgent Care

Allergic rhinitis itself is not a medical emergency, but some situations should prompt urgent medical review:

• Sudden severe difficulty breathing, wheezing, or chest tightness — especially if asthma is known
• Swelling of the lips, tongue, or throat, particularly after eating, insect sting, or starting a new medication — this may signal anaphylaxis and is a medical emergency
• High fever with severe facial pain or swelling around the eye — may suggest a serious sinus infection
• Severe or repeated nosebleeds that do not stop with simple pressure
• Sudden one-sided blockage with bleeding or a visible growth

For routine flares, contact the treating doctor for advice on stepping up the usual plan rather than waiting for the next scheduled appointment.

Frequently Asked Questions

Will my allergic rhinitis go away on its own?
Allergic rhinitis is usually a long-term condition, but its pattern can change over time. Some children “outgrow” symptoms; some adults develop allergies they did not have before. Even when the underlying allergy persists, symptoms can often be well-controlled.

Are intranasal steroid sprays safe to use long-term?
When used at standard doses and with correct technique, intranasal corticosteroid sprays are generally considered safe for long-term use. Local side effects such as dryness and minor nosebleeds are common; serious side effects are uncommon. They are not the same as oral steroids and have far less effect on the rest of the body.

What is the difference between allergic rhinitis and a sinus infection?
Allergic rhinitis is inflammation from an immune reaction to an allergen and is not contagious. A sinus infection (sinusitis) involves infected, inflamed sinus cavities, often with facial pain or pressure, thicker discoloured discharge, and sometimes fever. Allergic rhinitis can lead to sinusitis if poorly controlled.

Do I need allergy testing?
Not always. Many cases of allergic rhinitis are diagnosed and treated based on history and examination. Testing is most useful when triggers are unclear, when symptoms are severe or persistent, or when immunotherapy is being considered.

Will allergen immunotherapy cure my allergy?
Immunotherapy aims to change the immune response rather than simply suppress symptoms. Many patients have a meaningful reduction in symptoms that can continue after the course finishes. It is not a guaranteed cure for everyone, and it requires a long-term commitment of three to five years.

Can I become resistant to my allergy medications?
True resistance is not typical with most allergy medications. Sometimes it feels that way because the allergen burden has increased, the wrong medication is being used, or technique is suboptimal. A medication review with the doctor often helps.

Is allergic rhinitis linked to asthma?
Yes. The two conditions share underlying inflammation and frequently coexist. Major guidelines now recognise the upper and lower airway as one system. Treating allergic rhinitis can help asthma control, and vice versa.

Can stress make allergic rhinitis worse?
Stress does not cause allergies but can intensify the perception of symptoms and disturb sleep. Managing stress is a sensible part of overall care for any chronic condition.

Are there foods I should avoid?
Most patients with allergic rhinitis do not need a special diet. Some people with pollen allergy experience itching of the mouth with certain raw fruits or vegetables — called pollen-food allergy syndrome — and may need to avoid specific foods raw. This should be discussed with the doctor.

Can pets cause allergic rhinitis even if I have had them for years?
Yes. Sensitisation can develop after years of exposure, and existing allergies can worsen. A change in symptoms around a pet, even a long-standing one, is worth investigating.

Conclusion

Allergic rhinitis is a long-term inflammatory condition of the nose driven by an immune reaction to otherwise harmless substances. It ranges from mildly annoying to seriously disabling, and it overlaps with asthma, sinus disease, ear problems, and quality-of-life concerns more often than is sometimes appreciated.

Care is built around understanding individual triggers, reducing exposure where reasonable, using medications — most often intranasal corticosteroid sprays and second-generation antihistamines — in a planned way, and considering allergen immunotherapy when appropriate. For children, prompt and structured treatment can protect sleep, learning, and ear and airway health. For adults, good control allows normal work, exercise, and family life through the seasons.

With the right plan, developed together with the treating ENT or allergy doctor, most people with allergic rhinitis can move from constant interference to confident management of a condition that no longer defines their day.