Seasonal Allergy Myths, Explained by Dr. Christin Barry, MD

Allergies

Sneezing, congestion, itchy eyes, and a runny nose often get quickly labeled as “just allergies,” especially during the springtime.

But many common beliefs about seasonal allergies aren’t entirely accurate. Some symptoms that people often assume are allergies may actually point to a cold or virus, while other myths can even lead to people delaying their treatment for longer than they should.

To help clear things up, sat down with one of our physicians at DrHouse, Dr. Christin Barry, MD, an emergency medicine doctor with more than 10 years of clinical experience.

She shares her thoughts and insights on some of the most common seasonal allergy myths out there, how to tell allergies from other illnesses, and when it may be time to talk to a doctor.

Key Takeaways

• Seasonal allergies are not limited to spring. Symptoms can occur from spring through summer or fall depending on the specific allergen, such as tree pollen, grass, or mold.
• Fever is not caused by allergies. A fever usually indicates a viral or bacterial infection rather than seasonal allergies.
• Allergies and viral illnesses can share symptoms, including congestion and a runny nose. However, allergies more often cause itching, while infections are more likely to cause fever, body aches, and fatigue.
• Mucus color does not reliably distinguish allergies from infection. Yellow mucus can occur with allergies and does not automatically mean a bacterial illness.
• Starting allergy treatment early can make symptoms easier to control. Waiting until symptoms become severe can make inflammation harder to manage.
• Adults can develop allergies at any age. New allergy symptoms can appear later in life even if someone has never had seasonal allergies before.
• Symptoms lasting longer than two weeks are more likely to be allergies than a cold. Persistent symptoms should be evaluated by a doctor if they do not improve with treatment.

Meet Dr. Christin Barry

Dr. Christin Barry is an emergency medicine physician with more than 10 years of clinical experience practicing in New York City.

Throughout her career, she has treated a wide range of urgent and everyday health concerns, helping patients quickly identify which symptoms need immediate attention and which can be safely managed with routine care.

As a physician at DrHouse, Dr. Barry regularly sees patients with common complaints such as respiratory infections, sinus issues, urinary tract infections, and seasonal allergy symptoms through virtual doctor visits.

Why Allergy Myths Matter

Seasonal allergies are common, but they’re also widely misunderstood. Many people assume allergy season only happens for a short window in the spring, or that symptoms like congestion and a runny nose automatically mean allergies. 

In reality, symptoms can overlap with other conditions, and allergy seasons vary depending on what someone is allergic to.

Dr. Barry says one of the biggest misconceptions she hears is about the timing of allergy season itself.

“The biggest misconception is that allergy season is just this short period in the spring. Allergy season varies for different people. Some people have symptoms in the spring, some from spring into summer, and some people have spring and then fall again.”

Because of these misconceptions, people often delay treatment until symptoms become severe. But starting treatment earlier can make a significant difference.

“People wait too long to treat their allergies. You should really start treatment when symptoms are mild. If you wait until it gets really severe, it’s a lot harder to get the inflammation under control.”

Confusion can also happen because early allergy symptoms can resemble other respiratory illnesses, especially during the first few days.

“In the early stages it can sometimes be hard to differentiate,” Dr. Barry adds. “If symptoms last more than two weeks, it’s much more likely to be allergies than just a cold.”

Common Seasonal Allergy Myths and What’s Actually True

Myth 1: Seasonal Allergies Only Happen in the Spring

There are many people who associate allergies with springtime pollen, but allergy season isn’t limited to just a few weeks each year. In reality, allergy symptoms can appear at different times depending on what exactly triggers them.

Dr. Barry points out that allergy seasons vary widely from person to person.

“The biggest misconception is that allergy season is just this short period in the spring. Allergy season varies for different people. Everyone has different things that they’re allergic to. Some people it’s worse in the spring, some people it lasts spring into summer, and some people have spring and then fall again.”

Different allergens peak at different times of the year. Tree pollen is often highest in the spring, grasses can trigger symptoms into summer, and mold or other allergens may cause symptoms in the fall.

Myth 2: Flowers Are the Main Trigger of Spring Allergies

Flowers often get blamed for seasonal allergies, but they’re usually not the main cause. Most spring allergy symptoms are actually triggered by pollen from trees and grasses.

“While flowers do have pollen, the main drivers of spring allergies tend to be trees and grasses,” Dr. Barry explains.

Because these pollens are light and travel easily through the air, they can spread widely and trigger symptoms even if there aren’t obvious flowers nearby.

Myth 3: Allergies Cause Fever

Another common misconception is that allergies can cause a fever. According to Dr. Barry, this is not the case.

“Allergies do not cause a fever. If you have a fever, you should suspect some other kind of infection, viral or bacterial.”

A true fever, generally defined as a temperature over 100.4°F, usually points toward an illness such as a cold, flu, or another infection rather than seasonal allergies.

Myth 4: Viruses and Allergies Have the Same Symptoms

Allergies and viral illnesses can share some symptoms, which is why people often confuse the two. Congestion, a runny nose, and sinus pressure can appear in both conditions, especially early on.

However, Dr. Barry notes that there are usually important differences.

“There is some overlap in symptoms of viruses and allergies. The congestion and runny nose can be similar, but allergies tend to have more itchiness associated with the symptoms.”

Other symptoms can also help distinguish the two.

“Viruses tend to have more fever, body aches, and systemic symptoms associated with them.”

Myth 5: Mucus Color Tells You Whether It’s Allergies or an Infection

Many people believe that the color of mucus automatically reveals the cause of their symptoms. Yellow or green mucus is often assumed to mean a bacterial infection, but that’s not always true.

“Not really. Sometimes allergy mucus can still be yellow,” Dr. Barry says. “Yellow does not automatically mean it’s bacterial or viral.”

Mucus color can change as part of the body’s normal immune response, so it shouldn’t be the only factor used to determine the cause of symptoms.

Myth 6: I Should Only Take Allergy Medication When Symptoms Get Really Bad

Another common mistake is waiting until symptoms become severe before starting allergy treatment. According to Dr. Barry, that approach can actually make symptoms harder to control.

“You should start taking allergy medication as soon as you start noticing symptoms,” she explains.

Starting treatment early helps prevent inflammation from building up.

“If you wait until the symptoms are really severe, it’s going to be much harder to get your symptoms improved.”

Myth 7: Waiting Out Allergy Symptoms Is Fine

Some people try to simply wait for allergy symptoms to pass on their own. While mild symptoms may improve, delaying treatment can make allergies more difficult to manage once inflammation builds up.

Dr. Barry advises starting treatment early rather than waiting for symptoms to become severe.

“You should really start treatment when symptoms are mild. If you wait until it gets really severe, it’s a lot harder to get the inflammation under control.”

Beginning treatment at the first signs of allergy symptoms can help keep inflammation manageable and prevent symptoms from escalating.

Myth 8: Nasal Sprays Are Dangerous

Nasal sprays sometimes get a bad reputation, but not all sprays work the same way. Some people worry that they are unsafe to use regularly, which can prevent them from using effective treatments.

According to Dr. Barry, steroid nasal sprays are generally safe when used as directed.

“It is a myth. Steroid nasal sprays are safe to use long term.”

However, certain over-the-counter decongestant sprays can cause problems if used for too long.

“It’s actually the oxymetazoline sprays that can cause rebound congestion if you use them long term.”

Knowing the difference between these medications can help patients use nasal sprays safely and effectively.

Myth 9: An Air Purifier Is All You Need for Indoor Allergies

Air purifiers can help reduce allergens indoors, but they are usually only one part of managing indoor allergy triggers.

“You also need to worry about dust and mold,” Dr. Barry explains.

Keeping windows closed during high pollen days, regularly cleaning indoor surfaces, and reducing other potential allergens in the home are often necessary to control symptoms more effectively.

Myth 10: Moving to a New Location Gets Rid of Allergies

Some people believe that relocating to a different climate or region will permanently solve their allergy problems. While symptoms might temporarily improve in a new environment, allergies often return over time.

“Moving to a new location does not get rid of your allergies,” Dr. Barry explains. “There are going to be new allergens in that location that you might also respond to. Sometimes those reactions might take a little time to develop, but it doesn’t necessarily get rid of them.”

In many cases, people simply become exposed to different types of pollen, grasses, or environmental triggers in their new location. Over time, the immune system can begin reacting to those allergens as well.

Myth 11: If I’ve Never Had Allergies Before, This Must Be a Cold

It’s common for adults who have never experienced allergies to assume that symptoms like congestion or a runny nose must be a cold. However, allergies can develop later in life.

“Allergies can develop at any time in your life, so just because you’ve never had a reaction before doesn’t mean that you can’t develop allergies as an adult,” Dr. Barry says.

That means someone who has never had seasonal allergies before may still begin experiencing them as an adult.

Myth 12: Adults Can’t Suddenly Develop Allergies

Similar to the previous myth, many people believe allergies only start during childhood. In reality, the immune system can change over time, which means allergies can appear at any stage of life.

“Your immune system is constantly changing,” Dr. Barry explains. “It’s absolutely possible to develop allergies as an adult.”

Because of this, new symptoms that appear during certain seasons shouldn’t automatically be dismissed as a cold or minor illness.

Myth 13: Allergy Fatigue Is Just in Your Head

Fatigue is not usually the first symptom people think of when it comes to allergies, but it’s a very real experience for many patients. Persistent congestion, inflammation, and disrupted sleep can all contribute to feeling tired during allergy season.

“Allergy fatigue is real,” Dr. Barry says. “The inflammation in your body can definitely make you feel unwell, and the lack of sleep that sometimes comes with allergies can affect how you function day to day.”

When symptoms like congestion or sinus pressure interfere with sleep, it can make people feel drained even if the allergy symptoms themselves seem mild.

Myth 14: Over-the-Counter Allergy Medication Is Always Enough

Over-the-counter antihistamines and other allergy medications can help many people manage seasonal symptoms. However, they aren’t always enough to fully control allergies.

“They are good treatments for some people,” Dr. Barry explains, “but sometimes you do need to step it up with prescription medications if it’s not getting it under control.”

If symptoms continue despite trying over-the-counter treatments, it may be worth speaking with a doctor about other options or evaluating whether something else may be causing the symptoms.

What People Should Actually Know About Seasonal Allergies

How to Tell Allergies From a Cold or Virus

Seasonal allergies and respiratory infections can share several symptoms, which is why they’re often confused.

Congestion, a runny nose, and sinus pressure can occur in both conditions, especially during the early stages.

Dr. Barry explains that the type of symptoms and how long they last can provide important clues.

“There is some overlap in symptoms of viruses and allergies. The congestion and runny nose can be similar, but allergies tend to have more itchiness associated with the symptoms.”

Viral infections, on the other hand, often come with additional systemic symptoms.

“Viruses tend to have more fever, body aches, and systemic symptoms associated with them.”

Timing also matters. If symptoms resolve within a week or so, they may be more consistent with a viral illness. But if they continue longer, allergies become more likely.

“If the symptoms are lasting more than two weeks, it’s much more likely to be allergies than to be just a cold.”

Recognizing these differences can help people better understand what may be causing their symptoms.

Why Starting Allergy Treatment Early Matters

One of the most common mistakes people make during allergy season is waiting too long to start treatment. Many patients only begin taking medication when symptoms become severe.

According to Dr. Barry, starting earlier can make treatment much more effective.

“People wait too long to treat their allergies. You should really start treatment when symptoms are mild.”

When symptoms are allowed to progress, inflammation in the body can build up and become harder to control.

“If you wait until it gets really severe, it’s a lot harder to get the inflammation under control.”

Beginning treatment at the first signs of symptoms and continuing it throughout your allergy season can help keep symptoms manageable.

Can Allergies Be Evaluated Through Telehealth?

Many allergy symptoms can be evaluated through a virtual visit, especially when the diagnosis relies heavily on a patient’s history and symptom patterns.

Dr. Barry explains that understanding how symptoms developed, how long they’ve lasted, and whether they occur seasonally can often provide enough information to guide treatment.

“There’s not much on the physical exam that I’m really seeing. It’s really more the history that’s telling me if it’s allergies or a virus.”

Telehealth can help patients review their symptoms with a doctor, discuss treatment options, and determine whether their symptoms can be managed virtually or if an in-person evaluation might be necessary.

When Should You See a Doctor for Allergy Symptoms?

Many allergy symptoms can be managed with over-the-counter medications and lifestyle adjustments. However, there are situations where it’s important to speak with a doctor to make sure symptoms are being treated appropriately.

If symptoms continue despite trying allergy medication for a couple of weeks, it may be time to get evaluated.

“If you’ve been trying allergy medicine for like two weeks and you’re really not seeing any results, then I would probably see a provider to get evaluated,” Dr. Barry says.

Certain symptoms may also suggest that something other than allergies is causing the problem. Fever, body aches, or feeling generally unwell are often more consistent with viral or bacterial infections.

“If you have a fever, you should suspect some other kind of infection, viral or bacterial.”

Persistent or worsening symptoms should also be evaluated, especially if they begin to interfere with daily activities, sleep, or work.

In some cases, seeing a specialist such as an allergist may help identify specific triggers. Allergy testing, such as skin prick testing, can determine which allergens a person is reacting to and help guide treatment.

Talk to a Doctor About Allergy Symptoms From Home

If you’re dealing with ongoing allergy symptoms or aren’t sure whether your symptoms are allergies, a cold, or something else, speaking with a doctor can help clarify the cause and identify the right treatment.

With DrHouse, you can connect with a licensed physician from home to discuss your symptoms, review treatment options, and receive guidance on how to manage seasonal allergies more effectively.

Virtual visits make it easier to get care without waiting in urgent care clinics or scheduling an in-person appointment.