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Hay fever and desensitization

Dr Karen Martin
Reviewed by Dr Karen MartinReviewed on 19.10.2023 | 3 minutes read

If the pollen season is a time of year you dread, you may be looking for ways to relieve your hay fever symptoms. For a few people, avoiding the allergen and using products from your pharmacy aren't enough. Let's take you through the options your doctor may consider if your symptoms are taking their toll, including desensitizing with allergy immunotherapy.

Doctor’s advice

What can my doctor offer me?

If you've tried the usual antihistamine tablets, eye drops, and steroid nasal sprays from your pharmacy, you may want to discuss things with your doctor. They may consider prescribing a higher dose of antihistamine or a stronger steroid nasal spray. If your well-being is suffering despite this and it's interfering with your work, study, and sleep, they may consider referring you to an allergy specialist.

This is very much dependent on what is available in your local area, and each clinic will have criteria to follow about who they accept.

What is desensitization? What's allergy immunotherapy?

Let's consider allergic rhinitis, so we can understand ways to counter it. Pollen is a harmless substance, but if you have a particular allergy, your immune system sees it as an invader that threatens your health, and it seeks to destroy it. Your immune system does a similar job with viruses and bacteria. Mast cells are part of this response, and they release histamine, which is responsible for most of your hay fever symptoms.

With continued exposure – day after day and year after year – your immune system becomes primed to the invasion, and responses can get ever bigger. This is pollen sensitization or hypersensitivity. Steroid nasal sprays and antihistamines aim to reduce this response once symptoms have arrived.

Desensitization aims to prevent this snowball of symptoms from ever starting, as it re-educates your immune system to not see pollen as an enemy. Allergy immunotherapy introduces pollen in very small amounts before the season starts. Doses are gradually built up without triggering a reaction, so you're ready once pollen arrives in high concentrations.

You will have regular injections or a tablet that dissolves under the tongue, and it will be timed about three months ahead of your particular pollen season – tree, grass, weed, and mold pollens come at different times in the year.

It's quite a commitment, and you might need to continue this for some years, but there's a possibility this can eventually rid you of your hay fever. It's considered safe, but allergists are careful about selecting patients in which to use it.

It's effective against other environmental allergens causing allergic rhinitis, such as house dust mites or animal dander, and it's been used for wasp and bee venom allergies. Research into immunotherapy for food allergies is underway.

I've heard local honey can do the same job?

Good thinking – local bees collect nectar which might have captured local pollen. Many people are convinced that eating local honey desensitizes them and reduces their hay fever symptoms, but unfortunately, there's not enough scientific evidence to support this. The pollen in honey is flower pollen, which doesn't usually cause an allergic response, compared to tree or grass pollens.

What's the hay fever injection?

This is a steroid injection given just prior to your hay fever season. Steroids are a big sledgehammer to suppress any immune response.

Some people are convinced of its value at stopping or significantly reducing symptoms. Steroid injections come with side effects and risks, so do make sure that you have these explained to you before agreeing to any injection.

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Dr Karen Martin
Reviewed by Dr Karen Martin
Reviewed on 19.10.2023
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