Allergies are becoming more severe and widespread, with hospital admissions for allergic reactions jumping 52% between 2011 and 2017, while anaphylaxis cases rose 29% during the same period. Yet most people treating their allergies at home are making critical mistakes that undermine their relief. Allergists say the problem isn't just about choosing the right medication; it's about using it correctly and understanding when seasonal sniffles signal something more serious.

What's Actually Happening Inside Your Body When Allergies Strike?

When you encounter an allergen, your immune system overreacts to a substance it perceives as a threat. This triggers the release of histamine into the bloodstream, which causes inflammation designed to rid your body of the perceived invader. For seasonal allergies, tree pollen accounts for more than 90% of the problem in regions like Northern Virginia, with the worst symptoms typically hitting in April and May .

The connection between allergies and other conditions is more significant than many realize. Roughly 30 to 40% of people with allergic rhinitis, the medical term for hay fever, have or will develop asthma, and most people with asthma also have rhinitis. This happens because the upper airways (nose and sinuses) and lower airways (lungs) share the same inflammatory biology, meaning what affects one often affects the other .

How Can You Tell If It's Allergies or Just a Cold?

The two conditions share many symptoms, but allergists say there are reliable clues that distinguish them. Itching of the eyes, nose, or roof of the mouth is one of the most telling signs of allergies; colds rarely cause significant itching. Other allergy-specific symptoms include clear, watery nasal discharge, watery or red eyes, and sneezing fits triggered by seasonal patterns or specific exposures .

With a cold or viral infection, nasal discharge may thicken or change color, and you might experience body aches and fever. Viral symptoms typically resolve within two weeks. If your symptoms persist longer despite over-the-counter treatment, or if they're affecting your sleep, work, or quality of life, that's when you should see a specialist for evaluation .

Steps to Treating Seasonal Allergies Correctly

• Start with the right antihistamine: For mild or occasional symptoms, second-generation oral antihistamines like cetirizine (Zyrtec), loratadine (Claritin), levocetirizine (Xyzal), or fexofenadine (Allegra) are less sedating than older options and work well for sneezing, itching, and runny nose. Nasal antihistamines like azelastine (Astepro) also help with similar symptoms.
• Use intranasal corticosteroids for moderate to severe symptoms: For congestion and post-nasal drip, intranasal corticosteroid sprays like fluticasone (Flonase), mometasone (Nasonex), triamcinolone (Nasacort), and budesonide are the most effective over-the-counter options available. These sprays reduce inflammation in the nasal lining but require consistent use.
• Apply saline rinses as additional relief: Inexpensive saline nasal rinses are safe and can provide real additional relief when used alongside other treatments, helping flush out allergens and mucus.

Common mistakes people make when self-treating allergies can actually make symptoms worse. Using oxymetazoline nasal spray (Afrin) for more than 3 to 5 days causes rebound congestion that can be worse than the original symptoms. Many people also use incorrect spray technique, aiming toward the center of the nose instead of the outer wall, which increases nosebleed risk .

Another critical error is stopping intranasal corticosteroids too soon. These sprays take at least two weeks to reach peak effect, though some benefit starts within days. People often use sprays only when symptomatic rather than consistently throughout the season, which undermines their effectiveness. Adding oral decongestants unnecessarily can also raise blood pressure and disrupt sleep .

"Treating your nasal symptoms aggressively isn't just about comfort, it actually improves asthma outcomes," explained Dr. Karen Kaufman, a double board-certified allergist-immunologist at Kaufman Allergy, Asthma and Immunology in Vienna.

Dr. Karen Kaufman, Allergist-Immunologist at Kaufman Allergy, Asthma and Immunology

Why Are Food Allergies Becoming More Dangerous?

While seasonal allergies affect millions, food allergies present a more serious threat. Hospital admissions for food-induced anaphylaxis increased by 5.7% per year between 1998 and 2018, a three-fold increase over that 20-year period . Cow's milk causes over a quarter of deaths in children and is the single most common cause of fatal anaphylaxis in young people.

Many people wrongly believe food allergies are only an issue for children who grow out of them. Recent figures show around 6% of adults in the UK report having a food allergy, much higher than in the past. Adults can develop food allergies suddenly, even without any previous reactions .

The severity of food allergies means that anaphylaxis, a rapid, life-threatening reaction, requires immediate treatment with epinephrine. Symptoms typically appear within minutes of exposure, with the airway swelling, breathing becoming difficult, and blood pressure dropping. Despite five official reports since 2003 calling for improved allergy care, the UK remains a "Cinderella service" with a postcode lottery for diagnosis and treatment, compounded by a desperate lack of allergy specialists .

What Environmental Changes Actually Reduce Allergen Exposure?

Environmental control is genuinely first-line therapy for allergies, not just a nice supplement to medication. For outdoor allergens like pollen, taking shoes off at the door after spending time outdoors makes a real difference. Washing hands and face, along with saline rinses inside the nose, helps remove allergens before they trigger symptoms. Taking a shower after spending time outdoors and changing clothes also reduces pollen exposure .

For people with asthma and allergies, the stakes are higher. Poorly controlled allergic rhinitis is directly linked to worse asthma control. Patients who have asthma should be tested to determine which specific allergens are contributors, and should discuss specific treatment options with a specialist to include appropriate environmental controls, monitored lung function, optimized medication regimens, and allergen immunotherapy .

Can Allergies Change as You Age?

Yes, allergies can absolutely change across your lifetime, and hormones play a role in this shift. While boys actually have higher allergy rates in childhood, women experience higher rates of allergic rhinitis from adolescence onward. Estrogen and progesterone can increase certain inflammatory cells in the nasal passages and cause nasal blood vessel engorgement, which may worsen congestion and allergy symptoms .

The relationship between hormonal changes and allergies is more complex than previously thought. A large recent study using the NIH's All of Us Research Program found that after accounting for other factors, menopause was actually associated with a modest decrease in the odds of allergic rhinitis. What's clear is that hormonal fluctuations during the menstrual cycle, pregnancy, and the menopause transition can all influence nasal congestion and allergy symptoms .

Climate change is also extending allergy seasons. The number of days of pollination has lengthened over the past few decades, and pollen levels are on the rise, meaning people with seasonal allergies face longer periods of symptoms each year .

The key takeaway from allergists is that allergies deserve serious attention. Left untreated, they disrupt sleep, drain energy, worsen asthma, and can quietly pull down your quality of life for months at a time. If your symptoms persist beyond two weeks despite over-the-counter treatment, or if they're affecting your daily functioning, it's time to see a specialist who can identify your specific triggers and recommend a personalized treatment plan.