What are the symptoms of a pollen allergy?
Short answer
Allergy question
A pollen allergy causes sneezing, a runny or congested nose, itchy watery eyes, and an itchy nose, throat, or ears, often with postnasal drip, cough, and fatigue. Symptoms flare when pollen counts are high and usually follow a seasonal pattern in spring, summer, or fall rather than causing the fever or body aches of a cold.
This is a general research summary, not a diagnosis. A clinician or a test can confirm what applies to you.
Key facts
Hay fever from pollen causes sneezing, a runny or clogged nose, itchy eyes, nose and throat, red and watery eyes, and dark circles under the eyes.
Allergic rhinitis is an IgE-mediated reaction to inhaled allergens whose core symptoms are sneezing, nasal congestion, clear runny nose, and nasal itching.
Allergic rhinitis affects roughly 1 in 6 people, making pollen and other inhalant allergies one of the most common chronic conditions.
Here's the nuance
A one-liner rarely tells the whole story. This is the honest detail behind the short answer above.
A pollen allergy, known medically as seasonal allergic rhinitis or hay fever, mainly affects the nose, eyes, and throat. The most common symptoms are repeated sneezing, a runny nose with clear mucus, nasal congestion or stuffiness, and an itchy nose, throat, or ears. The eyes are frequently involved too, becoming red, watery, and itchy, a combination sometimes called allergic conjunctivitis.
Beyond these hallmark signs, many people develop postnasal drip, a cough, a reduced sense of smell, and clogged or popping ears. Because congestion disrupts sleep and the allergic reaction itself is tiring, hay fever often brings daytime fatigue, irritability, headache, and dark, puffy circles under the eyes sometimes called allergic shiners. Some people with pollen allergies also notice an itchy or tingling mouth after eating certain raw fruits and vegetables, a cross-reaction known as oral allergy syndrome.
A key clue that symptoms come from pollen rather than a cold is timing and pattern. Pollen allergy symptoms tend to appear or worsen when tree, grass, or weed pollen counts are high, often on dry, windy days, and to ease indoors or after rain. Unlike a viral cold, hay fever does not cause a true fever or body aches, the mucus stays clear and thin, and symptoms can persist for weeks or the whole season.
Symptoms happen because the immune system mistakes harmless pollen for a threat and releases histamine and other chemicals. Antihistamines, saline rinses, and steroid nasal sprays can control symptoms, while allergen immunotherapy is the only approach shown to reduce the underlying sensitivity over time. See a clinician if symptoms are severe, last most of the year, or come with wheezing or shortness of breath.
The key points
The handful of things that decide the answer — skim these if you only read one section.
Nose and sinus symptoms
Sneezing, a runny nose with clear mucus, congestion or stuffiness, postnasal drip, and an itchy nose are the core signs of pollen-driven allergic rhinitis.
Eye and throat symptoms
Itchy, red, watery eyes (allergic conjunctivitis) along with an itchy throat and ears often accompany the nasal symptoms.
Whole-body effects
Fatigue, headache, irritability, poor sleep, dark under-eye circles (allergic shiners), and a reduced sense of smell are common knock-on effects.
Seasonal, not infectious
Symptoms flare when pollen counts are high and ease indoors or after rain; unlike a cold there is no true fever and mucus stays clear.
Oral allergy syndrome
Some pollen-allergic people get an itchy or tingling mouth after eating certain raw fruits or vegetables that share proteins with pollen.
A note on how to use this
Informational only — not a diagnosis
This page is a general research summary about allergies and allergy care. It cannot tell you whether you personally have an allergy or what is triggering your symptoms. It is informational only and never a substitute for evaluation by a licensed clinician.
If you want a real answer for your body, at-home allergy testing or a visit with a clinician can identify what you actually react to — this page cannot diagnose you.
❓Frequently Asked Questions
A pollen allergy causes itchy eyes, nose, and throat, clear thin mucus, and symptoms that persist for weeks and track pollen counts. A cold usually brings thicker or discolored mucus, sometimes a mild fever and body aches, and clears within about seven to ten days. Itchiness strongly points to allergy rather than infection.
Symptoms last as long as you are exposed to the pollen you react to, which can mean several weeks or an entire season. Tree pollen peaks in spring, grasses in late spring and summer, and weeds like ragweed in late summer and fall. People allergic to several pollens may have symptoms across much of the year.
No. Despite the name hay fever, a pollen allergy does not cause a true fever. It triggers sneezing, congestion, and itchy watery eyes through an immune reaction to pollen, not an infection. If you have a measurable fever, body aches, or thick discolored mucus, a cold, flu, or sinus infection is more likely and worth checking with a clinician.
Yes. Postnasal drip from allergic rhinitis often causes a nagging cough. Pollen can also worsen asthma, leading to wheezing, chest tightness, or shortness of breath in people who have it. If you have trouble breathing, wheezing, or a cough that will not settle, see a clinician, since allergies and asthma frequently occur together.
Reviewed by
Curex Editorial TeamReviewed for accuracy
Last reviewed August 2026
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