Can You Develop a Pollen Allergy as an Adult?

Every spring, the pollen season brings an increase in respiratory allergies. Sneezing, a runny nose, itchy eyes… While many believe hay fever develops in childhood, it often appears in adolescence or adulthood. But can you actually grow allergic to pollen as an adult?

Yes, It’s Possible to Develop a Pollen Allergy in Adulthood

Developing a pollen allergy later in life is not only possible, but it’s a common occurrence. This typically happens in individuals with an underlying allergic predisposition – meaning they have a tendency to develop allergies throughout their life, whether they’ve experienced them before or not.

A Late Allergy on an Allergic Terrain

An allergy is essentially an immune system reaction to a normally harmless foreign substance, like pollen grains. In susceptible individuals, the body may begin to identify certain pollens as a threat, triggering inflammation of the respiratory tract, known as allergic rhinitis or hay fever. “By being exposed to pollen irregularly for years, the body can end up considering them as dangerous,” explains an allergist.

Immunologically, this reaction involves the production of antibodies called immunoglobulin E (IgE) directed against specific pollens, such as birch, oak, ash, or cypress. Upon subsequent exposure, these antibodies trigger the release of histamine, responsible for the familiar allergy symptoms.

Atopic March: Sometimes a Warning Sign

In some cases, the onset of a pollen allergy is part of a pattern called atopic march – a succession of allergic manifestations over a lifetime. However, this isn’t universal. Some individuals simply have an allergic predisposition without following this typical progression. “These are probabilities: some people with an allergic background will have an allergy to pollen, others will not,” notes a specialist.

Can You Become Allergic to Pollen Overnight?

While it may feel sudden, a pollen allergy typically develops gradually over time. The body can develop a specific immune response against allergens with repeated exposure. Interestingly, regular exposure can actually reduce the risk. “If an individual is exposed to pollen very regularly, they paradoxically have less risk of developing an allergy. The risk appears especially in the event of occasional but intense exposure,” explains an allergist. Moving to a new region with different or more abundant pollens can also trigger symptoms.

Changes in the environment may also play a role.

Can You Become Allergic as You Age?

The aging of the immune system can contribute to the development of allergies. Immune regulation mechanisms evolve with age, potentially promoting allergic reactions. Several environmental factors can also be involved:

• Air pollution, which weakens the respiratory tract
• Respiratory irritants, like tobacco smoke

“Flowery towns are pleasant, but with concrete, pollen tends to stagnate in polluted air. This can increase the risk compared to the countryside,” observes an allergist. These factors can disrupt the immune system’s balance and promote allergy development.

Pollen Allergy: What Are the Symptoms When It Appears in Adulthood?

The symptoms are generally the same regardless of when the allergy develops. Common signs include:

• Repeated sneezing
• Runny nose (clear discharge)
• Stuffy nose
• Itchy nose and palate
• Red, stinging, or watery eyes

Some people also experience significant fatigue, which can impact their quality of life for weeks during pollen season. In some cases, the allergy can progress to allergic asthma, with coughing, wheezing, or respiratory discomfort, particularly in individuals with pre-existing respiratory issues or smokers.

How Long Does a Pollen Allergy That Appears in Adults Last? Can It Disappear?

Once a pollen allergy develops, it tends to recur each year during pollen season. “The allergy manifests itself when the pollens to which the person is sensitive are present. You can be allergic to one or more different pollens,” explains an allergist. Heredity plays a role, but indirectly. “Heredity predisposes to allergies in general, not to a specific allergy. You don’t necessarily have the same allergy as your parents.”

The duration of flare-ups can vary from weeks to months. In most cases, the allergy persists over time, even though its intensity may fluctuate. Symptoms may subside spontaneously in some individuals, while new allergies may develop throughout life.

What to Do If You Have a Pollen Allergy in Adulthood?

If you experience new symptoms, consult a general practitioner or allergist. Diagnosis involves a medical examination and can be confirmed with allergy tests to identify the specific pollens responsible. Treatment options include:

• Antihistamines
• Anti-inflammatory nasal sprays
• Antiallergic eye drops
• Allergen immunotherapy (desensitization) in some cases

Can We Avoid Becoming Allergic to Pollen?

There’s no guaranteed way to prevent allergies. However, certain measures can limit exposure to pollen and alleviate symptoms:

• Avoid prolonged outdoor activities during peak pollen times
• Keep windows closed during high pollen concentration periods
• Use a pollen filter in your car
• Wear sunglasses outdoors
• Ventilate your home early in the morning or late in the evening
• Rinse your hair before bed
• Limit exposure to pollutants and respiratory irritants, such as tobacco smoke

“Once you are allergic, the main objective is to limit exposure to pollen. For example, by avoiding going out at times when concentration is highest, particularly around the middle of the day when the weather is nice and windy,” advises an allergist.