What happens if you have allergies for a long time?

Summary: Allergies can develop at any age and may persist for years, sometimes worsening over time. Various factors like increased exposure, immune system changes, and lifestyle shifts can contribute to new allergies. Left untreated, allergies can lead to serious health issues, including chronic infections and asthma. While some allergies fade over time, others remain lifelong. Proper management—through medications, immunotherapy, and lifestyle adjustments—can significantly reduce symptoms.

Allergies can be a lifelong struggle or a sudden, unexpected change in your health. One day, you’re enjoying springtime without a care in the world—then suddenly, pollen turns you into a sneezy, red-eyed mess. Or maybe you’ve had allergies for years and wonder if they’ll ever go away.

So, why do some people develop allergies later in life? Can they ever disappear? And what happens if you just ignore them?

How allergies develop?

At their core, allergies are an overreaction of your immune system. Normally, your immune system protects you from harmful invaders like bacteria and viruses. But when you have allergies, your body mistakes harmless substances—like pollen, pet dander, or peanuts—as dangerous threats and launches an immune response.

When this happens, your immune system produces antibodies called Immunoglobulin E (IgE). These antibodies trigger the release of chemicals like histamines, which cause allergy symptoms such as sneezing, itching, swelling, and, in severe cases, anaphylaxis (a severe and potentially life threatening type of reaction). Allergies can be:

• Genetic – If one or both of your parents have allergies, you’re more likely to develop them.
• Environmental – Your surroundings and exposures can play a big role in triggering allergies.

Even if you have a genetic predisposition, you may not develop allergies unless you're exposed to a specific allergen. Likewise, someone with no family history of allergies can develop them later in life due to environmental triggers.

Also read: Runny nose and sneezing – What is it & how to get better naturally?

When do allergies typically develop?

Most allergies start in childhood, but they can appear at any age. Some children outgrow their allergies, while others carry them into adulthood. On the flip side, some people who had no allergies as children suddenly develop them in their 20s, 30s, or even later.

Why do I have allergies now when I didn't before?

If you’ve never had allergies and suddenly develop them, it might feel confusing or even unfair. But this is actually more common than you’d think. Here’s why:

• Increased exposure – Moving to a new place with different plants, animals, or foods can expose you to allergens you hadn’t encountered before.
• Weakened immune system – Stress, illness, or even aging can make your immune system more reactive.
• Changes in lifestyle – Spending more time indoors, dietary changes, or exposure to pollution can trigger new sensitivities.
• Hormonal shifts – Pregnancy, puberty, and menopause can alter your immune response, making you more prone to allergies.

This is why some people suddenly become allergic to things they’ve tolerated for years.

Is it normal to have allergies for a long time?

Yes. Many people have allergies for years or even their entire lives. The severity may change over time—some allergies fade, while others get worse.

Seasonal allergies, for example, often last for decades unless managed properly. Food allergies, on the other hand, can sometimes disappear, especially if they first appeared in childhood.

The persistence of allergies depends on factors like genetics, immune system function, and environmental exposure.

Also read: How to stop allergies naturally - GP approved tips

What happens if allergies are left untreated?

Ignoring allergies might seem harmless, but over time, they can lead to bigger problems:

• Chronic sinus infections – Constant inflammation can lead to blocked sinuses, making infections more likely.
• Asthma – Untreated allergies can trigger or worsen asthma, making breathing difficult.
• Fatigue & poor sleep – Allergy symptoms can disrupt sleep, leading to exhaustion and difficulty concentrating.
• Severe reactions – Some allergies, especially to foods or insect stings, can become more severe over time, increasing the risk of anaphylaxis.

In short, allergies are more than just an inconvenience—they can have a real impact on your health and quality of life.

Can allergies go away with time?

Sometimes. Some childhood allergies, such as those to milk or eggs, may disappear as the immune system matures. However, allergies to peanuts, shellfish, and environmental factors (like pollen or pet dander) tend to persist.

In rare cases, adult-onset allergies can also disappear over time, but there’s no guarantee. Allergy immunotherapy (allergy shots) can sometimes help reduce or eliminate certain allergies by gradually desensitising your body's immune response to the allergen over time.

Why are my allergies not going away?

If your allergies aren’t improving, there could be several reasons:

• Continued exposure – If you’re constantly exposed to allergens, your body stays in reaction mode.
• Immune system changes – Some people’s immune responses become more sensitive over time.
• Other health conditions – Chronic illnesses or infections can make allergies worse.
• Inadequate treatment – Over-the-counter medications may not be strong enough, and you might need prescription treatments or immunotherapy.

If your allergies feel like they’re getting worse instead of better, it might be time to see a specialist.

What damage do allergies do to the body?

Long-term allergies can cause chronic inflammation, which has broader effects on your health:

• Sinus infections – Constant congestion can lead to bacterial infections.
• Ear infections – Allergies can cause fluid buildup in the ears, leading to infections.
• Lung problems – Allergies can worsen asthma and other respiratory conditions.
• Skin issues – Some allergies can trigger eczema or hives.

Allergy symptoms might seem like just a minor inconvenience, but over time, they can wear your body down.

How to manage your allergies: Scratch tests and shots

If allergies are interfering with your life, it’s important to identify the specific triggers. Allergy testing (such as skin prick tests) can pinpoint what you’re allergic to.

Treatment options:

1. Over-the-counter medications – Antihistamines, nasal sprays, and eye drops can help manage symptoms.
2. Allergy shots (immunotherapy) – Gradually train your immune system to tolerate allergens.
3. Lifestyle changes – Reducing exposure, using air purifiers, and adjusting your diet can help.

Avoiding allergens completely isn’t always possible, but with the right management plan, you can reduce symptoms significantly.

How does telehealth help with allergies?

Telehealth makes managing allergies easier by providing quick access to doctors from anywhere. Through a telehealth appointment, you can discuss your symptoms with a doctor and receive an instant script for allergy medications. If allergies impact your daily life, you can also request a medical certificates or doctor certificate online for work or school. For more severe cases, an online doctor referral can connect you to an allergy specialist, and pathology referrals can be issued for allergy testing—all without needing an in-person visit.

When to consult a doctor?

You should see an allergist if:

• Your symptoms are severe or worsening.
• Over-the-counter medications aren’t helping.
• You suspect a food allergy or experience anaphylaxis.
• Your allergies interfere with your daily life or sleep.

An allergy specialist can help develop a treatment plan tailored to your needs.

Final thoughts

Allergies can be frustrating, unpredictable, and even debilitating—but they don’t have to take over your life. Understanding what triggers your symptoms and taking steps to manage them can make a huge difference. If you’re struggling, talk to a doctor. Relief is possible—you just need the right plan.