Cedar Fever Symptoms, Causes, Treatment

Cedar Fever is a seasonal disease that can occur annually in areas where cedar trees are abundant. This disease can result from a fungus that infects blue cedar trees, Juniperus virginiana, in a too wet and humid environment. It is more likely to occur during the late summer months when there is an increased potential for heavy rainfall and high humidity levels.

However, in many regions—especially places with a high density of cedar or juniper trees such as central Texas—cedar fever typically strikes during the winter months. The season generally runs from December to February, though some people may start experiencing symptoms as early as November, and these symptoms can linger into March. This is because certain types of cedar and juniper trees, like Ashe juniper, pollinate in the winter rather than spring. In fact, when conditions are right, you might even see clouds of pollen billowing off trees, making them look as if they’re “smoking.”

Cedar fever is, by nature, a seasonal affliction. Its symptoms tend to improve once spring arrives and pollen counts drop. The timing and severity of symptoms can vary from person to person, depending on individual immune responses and environmental factors.

If you live in an area where cedar trees grow, it’s essential to know what symptoms to watch for and what you can do to contain the spread of the disease.

The most common cedar fever symptoms occur in the nose, respiratory tract, eyes, and skin. We discuss these symptoms below.

Duration of Cedar Fever

Cedar fever tends to make its grand entrance in the winter months, especially when the pollen count starts to climb. Most folks notice symptoms ramping up between December and February, but don’t be surprised if the sneeze fest starts as early as November or lingers into March. The exact timing and duration can vary depending on your immune system and the local pollen levels each year.

In general, the worst of cedar fever fades as cedar trees finish releasing their pollen, so those itchy eyes and runny noses thankfully don’t stick around all year. For some, the misery lasts just a few weeks; for others, it can drag out over a couple of months—particularly during especially heavy pollen seasons.

How Is Cedar Fever Different from Other Allergies and Hay Fever?

You might be thinking, “Isn’t cedar fever just another run-of-the-mill allergy?” Not quite! While cedar fever shares some symptoms with more familiar allergies and hay fever—like sneezing, nasal congestion, and itchy eyes—it comes with its own unique quirks.

First off, cedar fever specifically refers to the allergic reaction caused by pollen from cedar trees, especially Ashe junipers, which thrive in places like central Texas. Unlike classic hay fever (also known as allergic rhinitis), which can flare up in the spring due to grass or flower pollen, cedar fever hits its peak during the winter months, usually from December through February. Some unlucky folks can even start feeling symptoms as early as November, with the misery dragging on into March.

Another twist: cedar fever gets its name from the common misconception that it causes high temperatures, but most people don’t actually develop a fever at all. The real troublemaker is the immune system, mistaking cedar pollen for a threat and launching an attack—cue all the classic allergy symptoms.

So, while hay fever is triggered by a variety of allergens ranging from pollen to pet dander and mold, cedar fever is all about that fine, yellow dust released by cedar trees in winter. The timing, the culprit, and even the regional impact set cedar fever apart from the allergies you might battle in other seasons.

Where Are Mountain Cedar Trees Found?

Mountain cedar trees, which actually belong to the juniper family, are widely distributed across several regions. You’ll find them thriving in the southern and central United States, particularly in Texas, Arkansas, Oklahoma, Missouri, New Mexico, and Arizona. Beyond the U.S., these trees also grow in parts of Mexico and are native to regions in Japan. If cedar trees are a familiar sight in your area, there’s a good chance you’re living in one of these cedar hotspot zones.

What Exactly Is a Mountain Cedar Tree?

Despite the name, mountain cedar isn’t actually a true cedar at all—it’s a type of juniper, known more formally as Juniperus ashei. These trees flourish throughout the south-central United States, popping up in places like Texas, Oklahoma, Arkansas, and even stretching into parts of Mexico and Japan. If you’ve ever driven through the Hill Country during the winter, you’ve probably noticed these evergreens dotting the landscape.

An interesting quirk: not all mountain cedars are equal when it comes to allergies. Only the male trees produce the infamous pollen, which is released from small, rust-colored cones. The female trees, on the other hand, are adorned with berry-like cones that look more like tiny blueberries than anything cedar-related.

So next time you spot that shaggy evergreen or feel your nose start to twitch, you’ll know a bit more about the culprit rooted in the landscape.

Cedar Fever Causes

The main cause of cedar fever is a high density of cedar pollen in the air. A small amount of the same pollen wouldn’t have the same effect on your body.  ‌

Cedar trees release a large amount of pollen in the air and have different pollination models. Instead of pollinating in the spring-like most trees, these cedar trees pollinate in winter. A lot of cedar pollen released is the reason for cedar fever and allergies.

How Is Cedar Fever Diagnosed?

Diagnosing cedar fever is usually a straightforward process, especially if your symptoms flare up during cedar pollen season and you live near areas dense with cedar trees. Most healthcare providers start by asking about your symptoms and when they occur. If your itchy eyes, sneezing, and cough match the timeline of winter pollen release (rather than the spring typical of other tree allergies), cedar fever is a prime suspect.

To confirm, your doctor may recommend allergy testing. The most common approach is a simple skin prick or scratch test. Here, tiny amounts of various allergens are introduced to your skin—usually on your forearm or back—to see if you react to cedar pollen or something else. If the skin becomes red or raised where cedar pollen is applied, you’ve got your answer.

In some cases, your provider might suggest a blood test to look for specific antibodies linked to cedar pollen. This is especially helpful if skin testing isn’t an option. Regardless of the method, matching your exposure, symptoms, and test results makes it much easier to pinpoint cedar fever as the culprit.

How Is Cedar Fever Diagnosed?

Diagnosing cedar fever typically begins with a visit to your healthcare provider, especially if you notice symptoms flaring up during cedar pollen season. Two main types of allergy tests are used to confirm whether cedar pollen is the culprit:

• Skin Prick Test: This is the most commonly used method. Your provider will introduce tiny amounts of cedar pollen—or other potential allergens—just under the surface of your skin, usually on your forearm or back. If you’re sensitive, you’ll develop a small raised bump or redness where the allergen was applied, which helps pinpoint the trigger.
• Blood Test: Another option is a blood test, such as the ImmunoCAP® or the RAST test. These tests measure the levels of allergy-related antibodies (IgE) in your blood when exposed to cedar pollen. Blood tests are often chosen if skin tests aren’t possible due to skin conditions or other medical factors.

Doctors may also factor in when your symptoms start and how long they last. If your symptoms show up every winter, around the same time cedar trees are pollinating, that’s a good clue—especially if other illnesses like the flu or a cold have been ruled out.

Understanding how cedar fever is diagnosed can help you take the first steps in managing your seasonal symptoms.

Why Do Some People Get Allergies While Others Don’t?

You might wonder why cedar fever hits your neighbor hard every year, while you stroll through the pollen clouds unaffected. The answer lies in a mix of genetics and environmental exposure. Your body’s immune system decides how it responds to allergens like cedar pollen. If you have a family history of allergies, chances are higher that you’ll develop them too.

Environmental factors play a significant role as well. Growing up in areas with high pollen counts or being constantly exposed to cedar trees can prime your immune system to overreact. Essentially, both the genes you inherit and your day-to-day exposures determine whether your body waves the white flag or rallies its defenses during cedar season.

Common Cedar Fever Symptoms

Itchy, Watery, Red Eyes

One of the most prominent signs that you have cedar fever is itchy, watery, red eyes. It usually manifests as a burning sensation in the eyes. The itching can eventually cause the eyes to swell. 

Sneezing and Coughing

In many cases, when you have Cedar Fever, you will suffer from persistent sneezing and coughing. A scratchy feeling follows this in your throat and chest. 

Risks for People with Asthma and Other Respiratory Conditions

If you have asthma or another underlying respiratory condition, cedar fever can pose extra challenges. People in this group often notice more intense symptoms, like difficulty breathing, tightness in the chest, or even wheezing. The influx of cedar pollen can trigger asthma attacks or worsen existing respiratory issues. It’s important to be especially cautious if you have these conditions and to consult your healthcare provider if symptoms become severe or persistent.

Taking extra preventive steps—such as using air purifiers, keeping windows closed during high pollen days, and following your prescribed treatment plan—can help manage these risks.

Skin Irritation

Microscopic fungi typically cause the skin irritation that you experience from cedar fever. These fungi become airborne when the cedar breaks, allowing them to enter your body through your nose, mouth, and skin. The fungi can then move throughout the body very quickly, irritating various areas.

Sinus Pressure

An inflamed or swollen membrane around the nasal passages causes sinus pressure. The symptoms of sinus congestion and pain can be uncomfortable, but relief is available.

Runny Nose and Nasal Congestion

A cedar allergy causes nasal and sinus mucous membrane swelling, causing nasal blockage and increased mucus production. The high pollen counts cause severe sneezing, runny nose, nasal blockage, and itching of the nasal passages.

Fatigue

As a result of a runny nose and nasal congestion, you will get a headache, and the headaches often lead to fatigue.

When to See a Healthcare Provider

While many people can manage cedar fever symptoms at home using over-the-counter allergy medicines, sometimes your symptoms might be more stubborn than expected. If you notice that your sneezing, congestion, or itchy eyes aren’t improving—despite your best efforts—or if your symptoms are severe enough to interfere with your daily life, it’s time to call your healthcare provider.

You should also seek medical advice if you experience:

• Trouble breathing or wheezing
• Persistent sinus pain or pressure
• Severe headaches that don’t respond to standard remedies
• Symptoms that linger well beyond cedar pollen season

A healthcare professional can guide you to stronger prescription medications or discuss additional treatment options, such as allergy shots or nasal corticosteroids, to help you find relief. Don’t hesitate to reach out—relief is available, and there’s no need to suffer through cedar fever alone.

Tips for Surviving Cedar Fever Season

• Change Your Air Conditioner Filter Regularly: Cedar pollen can be easily airborne during the Cedar Fever Season. You must change your air conditioner filter regularly since it is an indirect form of contact.
• Bathe Your Pets Often: Pets that live inside the house with you are likely to get cedar fever. You should bathe them often and brush their coats regularly to keep the cedar pollen levels down in your home.
• Keep Your Doors and Windows Locked: To keep out cedar pollen, make sure you keep your doors and windows locked – especially if a cedar tree is in your yard.

Other practical steps to reduce your cedar pollen exposure:

• Avoid Going Outside on Dry, Windy Days: Cedar pollen levels are typically highest when the weather is dry and windy. Minimize outdoor activities during these times.
• Wash Your Clothes After Being Outside: Pollen can cling to your clothes. Change and wash your clothes as soon as you get home, and opt for using your dryer instead of hanging laundry outside.
• Clean Your Home and Outdoor Surfaces Frequently: Regularly dust and vacuum inside your home, and wipe down outdoor surfaces to remove any pollen buildup.
• Check Pollen Counts Before Heading Out: Weather apps and local forecasts often report daily pollen levels—plan your outdoor time when counts are lower.
• Wear Protective Gear: If you need to be outside, consider wearing a dust mask, sunglasses, and a hat. These help limit the amount of pollen that can get into your mouth, nose, and eyes.

Implementing these simple but effective practices can make a noticeable difference in how you weather cedar fever season.

Monitor Pollen Levels Before Heading Outside

A smart way to prepare for cedar fever season is to check the pollen count before stepping outdoors. Several reliable methods can help you monitor local pollen levels:

• Check Online Resources: Websites like Weather.com, Pollen.com, and the National Allergy Bureau provide up-to-date pollen forecasts for your area.
• Use a Weather App: Many smartphone weather apps include daily pollen level information, making it easy to plan your outdoor activities accordingly.
• Watch Local News: TV and radio weather segments often mention pollen forecasts, especially during peak allergy seasons.

By keeping an eye on daily pollen reports, you can better decide when it’s safer to venture outside or if it’s best to limit time outdoors, particularly on high pollen days. This simple step can make a significant difference in managing your cedar fever symptoms.

Can Cedar Fever Be Prevented?

While there’s no guaranteed way to completely prevent cedar fever, you can take steps to reduce your exposure and lessen your symptoms. Cedar pollen is persistent and hard to avoid if you live anywhere near cedar trees, but you don’t have to simply suffer through it. Try these preventive strategies:

• Limit Outdoor Activities: When cedar pollen counts are high—usually in winter—try to stay indoors as much as possible, especially on windy days.
• Use High-Quality Air Filters: Update your home’s air filters regularly and consider using HEPA filters to catch more pollen.
• Shower and Change Clothes: After spending time outdoors, shower, wash your hair, and change clothes to remove pollen that may have settled on you.
• Keep Windows and Doors Closed: Maintain a barrier against pollen by keeping windows and doors closed, particularly during peak season.
• Monitor Pollen Counts: Check local pollen forecasts and plan your daily activities accordingly.

While these tips can’t offer total protection, they can go a long way in helping you manage cedar fever before it makes itself at home.

Cedar Fever Treatement

Asthma Medications

If you have asthma, cedar fever symptoms can sometimes make breathing more difficult. For those with both asthma and cedar allergies, using prescribed asthma medications can be essential during cedar season. These medicines help open the airways, reduce inflammation, and ease chest tightness and wheezing that may worsen with high pollen.

Asthma medications generally include:

• Daily control inhalers: These help prevent symptoms by reducing airway inflammation.
• Quick-relief inhalers: These provide fast relief during sudden flare-ups or asthma attacks.
• Nebulizer treatments: For some, a nebulizer might be more effective, especially if you’re having trouble using standard inhalers.

Using your asthma medications as directed by your healthcare provider can help keep your breathing steady and minimize cedar fever’s impact on your respiratory system.

Oral or Nasal Corticosteroids and Anti-inflammatory Drugs

Obtain a Prescription of Oral or Nasal Corticosteroids and Anti-inflammatory Drugs from Your Doctor: If you have severe cedar fever symptoms, your doctor may prescribe a treatment with oral or nasal corticosteroids and anti-inflammatory drugs. They include cetirizine (Zyrtec), diphenhydramine (Benadryl), fexofenadine (Allegra), and loratadine (Alavert, Claritin).