Rise of the Allergens and Allergies

The realm of allergies was largely unknown and unexplored until the beginning of the twentieth century, but over time we have learned a great deal about them. In the past twenty years allergic diseases have been diagnosed with increasing frequency. That means more people sneezing, wheezing, and rubbing itchy eyes. Allergies on the rise.
In 2008 the National Health and Nutrition Examination Survey published eye-opening findings: 58% of Americans are allergic to at least one airborne allergen. Airborne allergens aren’t found only in dirty, polluted areas. Dust mites can be found in your bed, your carpet, floating around in the air, and many other places inside your own home.

Dr. Jonathan Corren points out in 100 Questions & Answers about Allergies, that 3% of Americans were living with asthma in 1990, while now the number is all the way up to 7%. During the same period, skin-based allergies have risen from 5% to 8%, and nasal allergies have skyrocketed from 10% to 20%. Similar increases are taking place throughout the developed world. The big question of course is – why?
The Hygiene Hypothesis

When an infant’s immune system is still developing it can’t tell the difference between hazardous substances and benign ones. The best way for it to learn at this stage is through allergic reactions. People are born into and grow up in much cleaner environments these days than they did in the past. Some people think that when children aren’t exposed to enough dirt and bacteria early on, their immune systems will not develop correctly. This is the essence of the “hygiene hypothesis.” Studies have shown that kids in daycares, places known for germ spreading, have fewer allergies than those raised at home with less contact with other children. None of this proves the hygiene hypothesis to be true, but it all makes for a compelling argument.

Global Warming

Many people believe that the rising temperatures and levels of carbon dioxide in the atmosphere could be directly contributing to the allergy increase. A study conducted in 2005 found that plants have been flowering earlier in the year, and that pollen production is on the rise. Another study released just last year confirmed that ragweed, many people’s nemesis during the fall months, now sheds pollen for up to a month longer than it did in 1995 in many parts of the United States.

The main allergy culprit during the spring is tree pollen. As spring temperatures increase, so too does the amount of pollen that trees produce. Poison ivy benefits greatly from high carbon dioxide levels, and that is bad news for the roughly 80% of us who develop a horrible skin rash upon coming into contact with the plant. Carbon dioxide not only boosts the plant’s growth, but also causes it to produce a more allergenic strain of urushiol, the oily substance that causes the rash.

Air Pollution

As factories ramp up production they release smoke into the air. People in congested cities like Los Angeles might face greater exposure to smog and other types of air pollution. This could be exacerbating people’s allergies, especially asthma. Tobacco smoke is probably the worst air pollutant, and it has been found to promote both allergy and asthma symptoms. Diesel fumes are also thought to promote allergies, while other outdoor air pollutants act more as irritants that can aggravate the symptoms of allergy and asthma.


The increase in allergy diagnoses may simply mean that there is a greater level of awareness about allergies than there was in the past. More people are going to allergists about their symptoms. More doctors are considering allergies when patients come to them with obvious symptoms. Certain conditions used to be treated without actually understanding the allergic reaction taking place. In the past, a patient may have been told she had dry skin, while today that same person is diagnosed with eczema.

Instead of suffering in silence, people are now seeking out ways to help control their allergies. Doctors have improved their methods of testing for allergies, and there are many options for people who find out they have them. Drugs aren’t the only answer anymore. People are steering clear of dust mites and other allergens by encasing their mattresses, using dust mite sprays, washing their clothes with special detergents, putting air purifiers in their bedrooms, and even using a solution for their pets.


There probably isn’t just one all encompassing reason to explain why the number of people with allergies is growing so rapidly. It is more likely that the above factors as well as others are all contributing in some way. We may never know the real reason for this allergy increase because funding usually goes towards solving the problem rather than finding out what’s causing it. If you are one of the many people suffering with allergies, however, then you definitely want to find out exactly what’s causing your symptoms. Once you do that it will be much easier to find the relief that you have been seeking. Plenty of allergy medications are available today, but it may be more logical to take preventative measures rather than waiting for symptoms to come about and then treating them.
Tommy Larson

Wishing you the best of health



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