Allergic rhinitis and hay fever: what actually helps

Allergic rhinitis is inflammation inside the nose caused by an allergy trigger, and hay fever is the seasonal pollen version. It can block the nose, disturb sleep, worsen asthma, trigger itchy eyes and reduce concentration. The most reliable approach is to identify the pattern, reduce exposure where practical, use medicines correctly and ask for review if symptoms are severe, persistent, one-sided or not responding.¹³

What allergic rhinitis is

Allergic rhinitis is an IgE-mediated allergic response in the lining of the nose. The immune system treats a harmless airborne particle as a threat, releases histamine and other inflammatory signals, and the nasal lining becomes itchy, swollen and leaky. That explains the familiar combination of sneezing, watery discharge, blocked nose, post-nasal drip and itchy eyes. Allergic rhinitis often comes on quickly after exposure, repeats in the same settings and can last for weeks or months.¹²

Hay fever is allergic rhinitis triggered by pollen. The label is slightly misleading because there is no fever and hay is not usually the main issue. In the UK, the season can stretch from early spring into autumn depending on which pollen you react to. Met Office guidance describes tree pollen as typically late March to mid-May, grass pollen from mid-May to July, and weed pollen from late June to September, with weather, geography and climate affecting the exact timing.⁴

Allergic rhinitis can also be perennial, meaning year-round. Dust mite, pets and mould are common indoor drivers. Some people have both: a background blocked nose from dust mite, then a severe flare when grass pollen peaks. A useful history asks where symptoms happen, when they flare, whether eyes itch, whether asthma worsens and whether the pattern changes away from home.

Seasonal versus year-round triggers

The trigger matters because the plan changes. Pollen control is about forecasting, timing medicines and reducing outdoor-to-indoor transfer. Dust mite control is about bedding, humidity, cleaning and bedroom exposure. Pet allergy is about dander reservoirs, not just whether the animal is in the room at the time. Mould-related rhinitis points to damp, condensation and ventilation as well as standard allergy treatment.

Exposure reduction helps, but it has limits. NHS hay fever advice includes wraparound sunglasses, showering and changing after being outside, keeping windows shut when pollen is high, damp dusting, HEPA vacuum filters, avoiding drying clothes outside and limiting grass exposure where possible.² Use the steps that are realistic, but do not let exposure control replace effective treatment.

When it may not be hay fever

The main alternatives are viral colds, COVID, sinusitis, non-allergic rhinitis, nasal polyps, medication-related congestion, deviated septum and rarer nasal or sinus disease. A cold is usually short-lived and may make you feel generally unwell. Allergic rhinitis repeats with exposure and commonly brings itch. Non-allergic rhinitis can be triggered by temperature changes, smoke, strong smells, alcohol, spicy food or humidity without an allergic trigger.¹

One of the biggest traps is using a decongestant nasal spray for too long. Decongestants can give short-term relief from a blocked nose by shrinking swollen blood vessels, but NHS guidance says decongestant nasal sprays and drops should not be used for more than a week because prolonged use can make stuffiness worse.⁷ Repeated reliance usually means the underlying inflammation is not controlled.

Be especially careful with one-sided symptoms. NHS information on nasal and sinus cancer notes that early symptoms can include a blocked nose on one side that does not go away and nosebleeds.¹⁰ Cancer is rare, but persistent one-sided blockage, repeated nosebleeds, facial swelling, numbness, visual symptoms, severe headache, fever, or major smell change should not be self-treated as hay fever.

What actually helps

Treatment works best when matched to the dominant symptom. If sneezing, itching and runny nose are mild, a non-drowsy antihistamine may be enough. Some people respond better to one antihistamine than another, so a pharmacist can help you choose and switch sensibly.

If the main problem is blocked nose, poor sleep, mouth breathing, post-nasal drip or moderate to severe symptoms, the centre of gravity shifts to a corticosteroid nasal spray. Blockage is inflammation and swelling, not just histamine. A BMJ systematic review by Weiner, Abramson and Puy, including 16 randomised trials and 2,267 people, found intranasal corticosteroids gave greater relief than oral antihistamines for nasal blockage, discharge, sneezing, nasal itch, post-nasal drip and total nasal symptoms.⁵

The more recent ARIA-EAACI evidence-to-decision framework reaches the same practical conclusion: for adults with allergic rhinitis, the panel recommends intranasal corticosteroids over oral H1-antihistamines, a strong recommendation based on moderate certainty evidence.⁶ That does not mean tablets are useless. It means tablets are often insufficient when congestion and sleep disruption are the problem.

Technique is not a minor detail. Nasal sprays are often aimed too far upwards, sniffed hard into the throat, or sprayed at the septum. A practical technique is: gently blow your nose, tilt the head slightly forward, use the opposite hand, aim the nozzle outwards towards the ear rather than the middle of the nose, breathe in gently, and avoid a hard sniff. Regular use matters more than one-off rescue use.

Eye symptoms may need separate treatment. Itchy watery eyes often need antihistamine or mast-cell stabiliser eye drops from a pharmacist or GP. If you wear contact lenses, have eye pain, light sensitivity, reduced vision or one red painful eye, treat that as an eye problem, not routine hay fever.

Be cautious with steroid injections marketed as a quick hay fever fix. GOV.UK reports that Kenalog is a prescription-only medicine and is not licensed for treating hay fever in the UK, despite being promoted by some clinics.⁸ Steroid tablets are sometimes used for exceptional severe flares, but they are not routine.

When to ask for medical help

NHS advice is to see a GP if allergic rhinitis symptoms get worse, asthma is getting worse, symptoms affect sleep or everyday life, you are not sure what is causing them, or pharmacy treatments are not working.¹ This is also the point to consider whether the diagnosis is right. Poorly controlled rhinitis can mimic sinus disease, worsen snoring, contribute to cough and make asthma harder to control.

Testing is not always needed for straightforward seasonal hay fever. It becomes more useful when the trigger is unclear, symptoms are severe, symptoms are perennial, asthma is involved, occupational exposure is possible, or immunotherapy is being considered. BSACI guidance describes diagnosis as history and examination, supported by specific allergy tests where appropriate.³ Skin prick testing and blood specific IgE tests can show sensitisation, but results still need matching to the real-life pattern. A positive dust mite result does not prove dust mite is the driver unless symptoms fit.

Where immunotherapy fits

Immunotherapy is different from antihistamines and nasal sprays. Instead of only suppressing symptoms, it gives carefully controlled allergen exposure to build tolerance over time. It is usually considered for moderate to severe allergic rhinitis that remains troublesome despite correct standard treatment, and it requires evidence that the allergen is clinically relevant.

UK access is changing. NICE recommended 12 SQ-HDM SLIT, known as Acarizax, as an NHS option for people aged 12 to 65 with moderate to severe house dust mite allergic rhinitis that is diagnosed by history plus a positive skin prick or specific IgE test and remains persistent despite symptom-relieving medicine.⁹ NICE also published TA1087 in August 2025 recommending betula verrucosa, Itulazax 12 SQ Bet, for adults with moderate to severe allergic rhinitis or conjunctivitis caused by pollen from the birch homologous group of trees, when symptoms persist despite medicines and sensitisation testing is positive.¹¹

That does not mean everyone with hay fever should jump straight to immunotherapy. It is a specialist treatment, usually taken for years, and needs the right allergen target. It is worth discussing when rhinitis is still controlling your life after a proper trial of avoidance, regular nasal steroid, appropriate antihistamine or eye drops, and asthma review where relevant.

A practical plan

Start with the pattern. If symptoms come every June, assume grass pollen until proved otherwise and start treatment before the usual flare. If symptoms are worst in bed and on waking, think dust mite, pets, mould, reflux, dry air and non-allergic rhinitis. If symptoms are new, severe or one-sided, do not force them into a hay fever story.

Then treat consistently. For mild itch and sneezing, ask a pharmacist about a non-drowsy antihistamine. For congestion, sleep disruption or persistent symptoms, prioritise a steroid nasal spray and technique. Add saline rinsing if thick mucus or pollen exposure is part of the picture. Use decongestant sprays only as short-term rescue if suitable.

Finally, connect rhinitis to the rest of your health. Poor nasal breathing can worsen sleep, exercise tolerance, cough and asthma. If you are comparing symptoms across conditions, the health library can help you map the overlap. The start here guide can help you prioritise, while insights helps separate evidence-based allergy care from expensive tests. If you are adding supplements or over-the-counter medicines, the stack builder can help check duplication and interaction risks.

This article is educational and does not constitute medical advice, diagnosis, or a treatment recommendation. Medication uses described as “off-label” are not licensed for that purpose in the UK and should only be considered under qualified clinical supervision. Always speak to your GP, pharmacist, or a registered specialist before starting, stopping, or changing any treatment. If you have severe or alarm symptoms - unintentional weight loss, blood in your stool, difficulty swallowing, persistent vomiting, a fever, or severe pain - seek urgent medical care.