Alerte rouge aux pollens sur tous les départements

[CARTE ALLERGIE POLLEN 2022]The risk of allergy is high in all departments and will remain so until the end of June with very favorable weather conditions for the emission and dispersion of high concentrations of grass pollen in the air.

The risk of allergy to grass pollen is now high in all departments.

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While this Sunday takes place the first round of the legislative elections, in terms of pollen we already know the result! Indeed, grass pollens are well ahead of the ranking, and even if the peak has passed, the concentrations will remain high in the coming days.“, announces the National Aerobiological Surveillance Network (RNSA) in its allergo-pollinic bulletin of June 10.

This high risk of allergy for grass pollen will unfortunately remain so for several weeks before decrease towards the end of June.

  • The risk of allergy will be low for other flowering herbaceous plants almost everywhere in France, namely plantain, sorrel and nettle pollen (of the Urticaceae family).
  • The risk of allergy will be low for the last oak pollen except around the Mediterranean where it could still reach the average level.
  • Around the Mediterranean, watch out for pollen from parietaires (from the Urticaceae family) and olive trees, which are increasingly present and may bother allergy sufferers.

>> Be careful not to put yourself under a lime tree because they are in bloom and even if the risk of allergy is low for these pollens, there may be local allergies.

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What are grass pollens?

Grasses include nearly 10,000 species (including timothy, cocksfoot, fescue, tares, bluegrass, foxtail, quackgrass, rye, wheat, corn, barley, oats, etc.) and are the main triggers hay fever in people with allergies. It is considered that 70% of people allergic to pollens are sensitive to grass pollens.

Grasses are pollinated by the wind (what scientists call anemophilous pollination). As this pollination is much less targeted than during pollination by an insect, plants with anemophilous pollination compensate for this lack by producing large quantities of pollen. For example, an average stalk of rye produces about 7 million pollen grains.

However, all it takes is a few grains of grass pollen in the air for the symptoms appear in people with allergies. They must therefore anticipate their allergy and start their treatment right now.

>> Cross allergies: whenyou are allergic to pollen grasses, there is a risk of cross-allergy with peanuts, wheat flour, melon, potatoes, peppers and tomatoes.

Grass pollen: how to relieve allergic symptoms?

Floral water compresses : if you have itchy, watery or red eyes, soak two cotton pads in chamomile floral water (German chamomile), then apply them to the eyes for a few minutes to soothe the irritation.

nasal sprays : in a bottle with a nasal tip, mix in equal volume:

  • feverfew hydrosol and saline in case of nasal itching. To spray directly in the mouth if your palate is irritated.
  • feverfew and peppermint hydrosols if you have a stuffy nose. Note: peppermint hydrosol is not recommended for children and in case of hypertension.

Aromatherapy by olfactory way: to stop the crisis net, impregnate a handkerchief with 2 drops of essential oil (HE) of tarragon or soak the wick of an olfactory stick with 10 to 15 drops of this HE. Take a deep breath at the first signs of a seizure. To renew if necessary.

  • To limit nasal congestion, impregnate the wick with an olfactory stick of 8 drops of katafray HE, then 2/3 drops of peppermint HE, then 3 drops of noble chamomile or chamomile HE. To breathe slowly during the crisis. Warning: contraindicated in pregnant women, breastfeeding women, children under 6 years old, if you are epileptic and asthmatic.

The pollen calendar

After the salutary winter break, the pollen season resumes in February/March with alder, birch, ash and cypress pollen (high risk) as well as poplar (medium risk)

  • April May : watch out for plane trees and cypresses (high risk), as well as birch, willow, beech and hornbeam (medium risk)
  • May June : watch out for the olive tree (medium risk)
  • May/August: watch out for grasses (high to very high risk)
  • August September : watch out for ambrosia

To note : The National Aerobiological Surveillance Network provides an information guide on its website on the main allergenic pollens of spring and summer, in town and in the countryside.

>> From June 15 to 30, these are the Ambrosia Days. The opportunity to remember that there is a platform to report ragweed plants if you spot any: www.signalement-ambroisie.fr

Practical advice for those allergic to grass pollen

Grasses include nearly 10,000 species (including timothy, cocksfoot, fescue, tares, bluegrass, foxtail, quackgrass, rye, wheat, corn, barley, oats, etc.) and are the main triggers hay fever in people with allergies. It is considered that 70% of people allergic to pollens are sensitive to grass pollens.

Grasses are pollinated by the wind (what scientists call anemophilous pollination). As this pollination is much less targeted than during pollination by an insect, plants with anemophilous pollination compensate for this lack by producing large quantities of pollen. For example, an average stalk of rye produces about 7 million pollen grains.

However, all it takes is a few grains of grass pollen in the air for the symptoms appear in people with allergies. They must therefore anticipate their allergy and start their treatment right now.

>> Note that whenyou are allergic to pollen grasses, there is a risk of cross-allergy with peanuts, wheat flour, melon, potatoes, peppers and tomatoes.

What to do if you are allergic

It is high time to take some precautions if you are allergic to grass pollen and to anticipate the treatment. In addition to taking your antihistamine treatment, consult a doctor or an allergist in the event of symptoms, regularly consult the risks of allergy on our website to adapt your treatment.

  • When preparing your meals, consider the foods that have a natural antihistamine effect
  • Rinse your hair at night when you get home.
  • Ventilate at least 10 minutes a day before sunrise and after sunset.
  • Do not dry your laundry outside.
  • Do not drive with the window open.
  • Avoid sports activities outside even if with the déconfinement the desire to escape is great!
  • Wear a mask with sunglasses and a hat.
  • Follow your treatment and do not hesitate to consult a doctor or an allergist in case of symptoms.

Remember to clean your nose well:This eliminates allergens that clog the nasal passages., says Thierry Folliard, naturopath. Several techniques exist. You are free to choose the one that seems easiest to you.

  • The easiest way : as with babies, specialists recommend tilting the head to one side, inserting a pipette of saline into the upper nostril, pressing hard. Secretions will exit through the opposite nostril. Repeat the gesture on the other side.
  • The sweetest way: use an “isotonic” seawater spray. This solution turns out to be gentler, but less effective than the first technique.
  • The most “natural” way : “buy a small watering can in a wellness shop, add a tablespoon of Guérande salt and a teaspoon of magnesium chloride before dissolving in water.” Tilt forward, turn your head to one side, hold your breath, pour the mixture into the nostril. The flow should be in the other nostril. Switch sides and repeat the operation.

More aggressive pollens due to pollution

There is a synergy between the increase in diesel particulates and the increase in IgE allergy antibodies to pollens.” explains to Top Santé (April 2020), Professor Frédéric de Blay, pulmonologist. The increase in CO2 in the atmosphere stimulates the production of pollen by plants, aggravating the symptoms of people suffering from allergic rhinitis or asthma. “With pollution (nitrogen oxide, ozone, particles, etc.), the plant produces more pollen, we also specifies Nicolas Viovy, researcher at the Climate and Environmental Sciences Laboratory. Pollution damages the envelope of pollen, which then releases its allergenic proteins into the air.”

In addition, pollution irritates the mucous membranes which normally filter allergens and all inhaled substances, it weakens the epithelial barriers (mucous membranes of the nose, eyes, skin, etc.), which allows allergens, chemicals, molds to penetrate more easily to the bronchi. As a result, people are more sensitive with lower amounts of pollen.

Main officials: fine particles emitted by the combustion of heating appliances, road transport (diesel and gasoline). Up to 800 times smaller than a hair, these particles would promote pollen allergies “by lowering the threshold of bronchial reactivity and/or by accentuating the irritation of the nasal or ocular mucous membranes in sensitized subjects”, indicates the National Agency for Food, Environmental and Occupational Health Safety (Anses). A study carried out in the capital has also shown that each episode of fine particle pollution leads to a significant increase in emergency room consultations for exacerbation of asthma.

Ambrosia: it colonizes more and more territories

Today, a large part of France is affected by ragweed pollen, in particular the Rhône-Alpes region, Burgundy, Pays de la Loire, Alsace and Poitou-Charentes. With the systematic use of machinery in agriculture and public works, thousands of cubic meters of soil containing ambrosia seeds are moved from place to place, which has gradually allowed this very allergenic plant to colonize new territories. And the number of allergic people increases every summer: “it is estimated that 6 to 12% of the population of the areas concerned is allergic” our association Stop Ambrosia.

>> To prevent its proliferation, report ragweed plants if you spot any: www.signalement-ambroisie.fr

Source :National Aerobiological Surveillance Network (RNSA)

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