You didn't pre-treat. Here's what to do now.

The ideal plan starts six weeks before pollen rises. The actual situation, for a lot of people, is that you remember to think about hayfever the morning your eyes won't stop streaming.

This is the realistic catch-up plan. It won't recover the early-season buffer you'd have had — that's gone — but it can meaningfully change the next two to three weeks.

The first 48 hours

The priority is to load the medications that take time to work, while doing everything you can to reduce the load on the system right now.

Start the nasal spray today

Even though intranasal corticosteroids take 2–3 weeks to reach full effect, they start working from day one. There's no benefit to waiting.

• Pick a daily time you'll remember — pair it with brushing your teeth.
• Don't stop because you don't feel a difference in the first few days. The effect builds.
• If you find the spray drips into your throat, you're tilting too far back.

Start the daily antihistamine

Take a second-generation antihistamine (cetirizine, loratadine, fexofenadine, or bilastine) today, then daily. Peak plasma in 1–3 hours; meaningful tissue saturation across 2–3 days of consistent dosing.

Don't switch to reactive dosing ("I'll take one when I feel bad"). That's the pattern that fails — by the time you feel bad, histamine is already bound to your receptors and the drug can only block the next molecule, not the current symptoms.

Saline rinse twice a day

This is the fastest-acting intervention you have. 28% symptom reduction in pooled trials, no side effects, costs almost nothing. Morning and evening, high-volume bottle or neti pot, sterile or pre-boiled water.

Antihistamine eye drops if eyes are involved

Don't wait to "see if the tablet handles it" — it likely won't, because oral antihistamines reach the conjunctiva poorly. Olopatadine or azelastine drops act within minutes.

Days 3–7: Bedding in

By the end of the first week:

• The antihistamine is at full tissue saturation.
• The nasal spray is roughly a third of the way to full effect.
• The saline rinse has cleared a meaningful amount of accumulated load.

You should be feeling notably better than day one. Not "fixed" — better. If you're not, that's a sign to check:

• Are you actually taking everything daily? Adherence drops fast once people feel improvement.
• Is your antihistamine the right one? If you're foggy on cetirizine, switch to fexofenadine or bilastine.
• Is the spray reaching the right place? Watch a technique video — most people aim it wrong.

This is also the right time to start the bedroom basics if you haven't:

• Windows closed from sunrise.
• Air purifier in the bedroom.
• Evening shower with hair wash.
• Bedding wash at 60°C.

Days 7–21: Reaching full protection

By three weeks of daily INCS, you're approaching full anti-inflammatory effect. This is when people who started late often feel their best in the season — better, sometimes, than if they'd half-heartedly pre-treated.

The temptation now is to dial things back because you feel okay. Don't. The treatment is what's keeping you okay. Stop and you'll feel why within 3–5 days.

What to expect honestly

A catch-up plan is not as good as a proper pre-season plan. Specifically:

• The first 10–14 days will be harder than they would have been.
• Sleep will likely be more disrupted in the catch-up window.
• You may need eye drops and second-rinse "bad day" add-ons more often than someone who started early.

By week 3, the gap closes substantially. By week 5, you're functionally in the same place. The cost of starting late is mostly paid in the first fortnight.

What not to do

• Don't use a first-generation antihistamine to "hit it hard." The sedation and cognitive impairment compound, and the symptom relief isn't better than second-generation.
• Don't start a daily decongestant nasal spray. Rebound congestion (rhinitis medicamentosa) sets in after about five days of continuous use, and you'll be in a worse position.
• Don't go to oral steroids first. They work, but they have meaningful systemic effects and are reserved for severe cases under clinical supervision. Talk to a GP if the standard regimen isn't enough.

When to escalate to a specialist

Most hayfever is well-managed by the routine above — saline rinse, daily INCS, daily antihistamine, eye drops as needed, the bedroom basics. But there's a clear threshold at which the right next step is a specialist allergy clinic rather than another tweak of the same regimen.

UK clinical practice — based on the ARIA framework adapted into local pathways — points to specialist referral when:

• You have moderate-to-severe symptoms (sleep disturbance, work or activity impairment, or troublesome symptoms) that remain uncontrolled after 2–4 weeks of correctly-used daily intranasal corticosteroid plus a non-sedating oral antihistamine. A simple way to put this: if your overall symptom score sits at 5 out of 10 or higher despite doing the routine properly, that's the threshold.
• You're needing repeated oral steroid courses to get through a season. This is an absolute indication — chronic oral steroid use is not a sustainable plan.
• You've had two or more debilitating pollen seasons despite optimal medication. You may be eligible for allergen immunotherapy (sublingual tablets or subcutaneous injections that desensitise your immune system over 3 years), which is provided through specialist services.
• You have multisystem atopy with poorly-controlled asthma alongside the hayfever — both need looking at together.
• There's diagnostic uncertainty, suspected occupational rhinitis, or red-flag features like unilateral nasal obstruction, blood-stained discharge, or facial pain. These need ENT rather than allergy referral.

The route

Where it exists in your area, the first stop is a GP with Special Interest (GPwSI) in allergy running a community clinic — faster access than hospital and sufficient for most referrals. Where it doesn't, your GP refers directly to a hospital-based specialist allergy clinic. ENT goes through a separate pathway for structural problems.

Waiting times vary considerably by region. If your symptoms are functional-life-affecting, ask about that explicitly — it can change the routing.

A note on what the referral threshold isn't: it isn't a numeric line in a national guideline. The 5/10 VAS figure and the 2–4 week trial period are widely-used expert-consensus benchmarks rather than RCT-derived cut-offs. The decision is fundamentally clinical — your GP weighing your symptom impact against what you've already tried — and it's reasonable to push the conversation if you feel the routine isn't enough.

Make next year easier than this one

Set a calendar reminder right now for six weeks before this season started. That's your start date next year. The single intervention with the highest payoff in hayfever management is setting that reminder while the memory of this year is fresh.

---

A catch-up plan works. It's not optimal, but it's effective, and the gap between catch-up and pre-season closes faster than people expect once the treatments are properly loaded.