Seasonal Allergies: Symptoms, Treatment, When to Seek Care

Seasonal allergies are also known as hay fever or seasonal allergic rhinitis. They often flare when pollen or outdoor mold levels rise^2,3.

Signs may include sneezing, congestion, itchy eyes, and fatigue. These symptoms can disturb sleep and harm daily performance^1,3.

Many people find relief by limiting exposure and using the right medicines^2,5. This guide reviews common signs, causes, treatment options, and reasons to seek care.

Seasonal allergic rhinitis is an immune response to allergens in the air¹. Common allergens include pollen from trees, grasses, and weeds^3,6. Mold spores can also cause seasonal symptoms^3,7.

The immune system may treat these harmless particles as threats. Immunoglobulin E, or IgE, is an antibody made against allergens.

Later contact can prompt the release of histamine and other chemicals^1,3. These chemicals cause the signs linked with hay fever^1,3.

The reaction often affects the nose, eyes, and throat^3,7. It may also involve the sinuses, ears, or lungs^1,3.

Hay fever is not contagious because a virus does not cause it^3,10. However, its signs may look much like those of a cold^3,4.

Seasonal allergy symptoms can begin soon after contact with an allergen². The symptoms a person experiences may include a runny or stuffy nose⁶.

Common signs include the following:

Itching, watery eyes, and frequent sneezing often occur with seasonal allergies^2,4. These clues can help separate allergies from some infections.

Hay fever can cause signs beyond sneezing and a runny nose. These less obvious signs may include the following:

Pollen can also worsen allergic asthma⁶. Hay fever symptoms can include coughing, wheezing, and trouble breathing^3,10.

Congestion and sneezing can make restful sleep difficult^3,8. Poor sleep may then cause tiredness or a general unwell feeling.

Fatigue and irritability can occur with allergic rhinitis². These effects may reduce performance at work or school^1,3.

Symptoms can also limit outdoor plans and other daily activities. Effective care may help reduce that burden.

Pollen is a fine substance released by trees, grasses, weeds, and flowering plants⁶. It can travel through the air and enter the eyes or nose⁶.

Common pollen allergy triggers follow broad patterns:

The exact timing depends on the plants and local area^6,7. In warm regions, pollen symptoms can begin as early as January⁶. They may also occur more than once during the year⁶.

Each person’s season depends on the pollen that causes a reaction⁷. People in the same area may therefore have different symptom periods⁷.

Mold spores can cause seasonal or year-round symptoms. Mold-allergy symptoms are often linked to warm, rainy weather^7,9.

Indoor mold can cause symptoms during any season. Dust mites, pet dander, and cockroach material are other indoor triggers^3,10. Pet dander means tiny flakes shed from an animal’s skin.

Indoor allergies may feel worse during colder months¹⁰. People often spend more time inside with closed windows during that season¹⁰.

Hot weather can also lead to more time indoors⁸. That change may increase contact with dust mites, pets, or indoor mold⁸.

Symptoms that last all year may not be purely seasonal. A clinician can check for indoor allergens or nonallergic rhinitis.

Some weather and outdoor tasks can raise allergen exposure. Other substances may irritate sensitive nasal passages.

Common factors include the following:

Rain may clear pollen from the air for a time. Yet mold-allergy symptoms can be linked to warm, rainy weather^7,9.

A yearly pattern can offer an important clue. Signs returning in the same months may point toward seasonal allergies^4,10.

Symptoms may start quickly after exposure to a trigger^2,10. They may also continue while that allergen remains in the air¹⁰.

Itchy eyes, an itchy nose, and repeated sneezing support an allergy-related cause^2,4. A throat tickle may also occur with allergies⁴.

Allergies and colds can both cause congestion and a runny nose^3,4. However, a cold comes from a virus^3,10. Hay fever comes from an immune response to an allergen.

These signs may fit an infection better:

A cold tends to clear within about one week¹⁰. Allergy symptoms can continue until the trigger leaves the air¹⁰.

For more detail, read Common Cold: Symptoms, Causes, Treatment & Care.

Not every long-lasting runny nose comes from an allergy. Nonallergic rhinitis can cause similar signs but may need different treatment^8,10.

A clinician often diagnoses allergic rhinitis from your history and an examination^1,7. Questions may cover timing, frequency, exposures, and seasonal patterns¹.

The examination may check the nose, eyes, and throat for inflammation⁷. Improvement with a nasal steroid may also support the diagnosis¹.

Testing may help when the trigger remains unclear¹. It may also help when standard care has not worked¹. Testing can guide care when immunotherapy is being considered.

A skin-prick test places small amounts of allergens on the skin⁶. The skin may become red, swollen, or itchy after a positive reaction⁶.

A specific IgE blood test looks for antibodies against a suspected allergen⁶. Blood tests may help when skin testing cannot be done^2,7.

Avoiding every airborne allergen is difficult⁷. However, small changes can reduce your contact with pollen and mold^2,5.

Try these steps during your allergy season:

Taking medicine before expected exposure may help prevent symptoms. Follow the label and any advice from your clinician.

A saline rinse uses salt water to wash the nasal passages. It can flush out mucus and allergens^2,5.

Use distilled water or water that was boiled and cooled². Do not use untreated tap water for a homemade rinse.

Clean the rinse device after each use. Leave it open so it can air-dry.

Ready-made saline products and kits are available. Follow the kit directions for the water and salt amounts.

Intranasal corticosteroids are steroid medicines sprayed inside the nose. They are a first-line hay fever treatment¹.

These sprays control nasal inflammation better than antihistamines¹. They are also considered the most effective allergic rhinitis treatment².

Regular use gives the best effect^1,2. Full benefits may take several days to appear¹.

Correct technique can improve results and reduce side effects¹. Place the spray tip just inside the nostril¹. Aim it away from the wall between your nostrils¹.

Sniff gently so the medicine stays inside your nose. Tasting it in your throat may mean you sniffed too hard.

Antihistamines block histamine released during an allergic reaction^4,10. They can ease sneezing, itching, runny nose, and watery eyes^2,5.

These medicines come as pills, liquids, nasal sprays, and eye drops^2,10. Eye drops may help with itchy or watery eyes².

Some oral antihistamines can cause sleepiness^2,9. Do not drive or use machinery after taking a medicine that causes drowsiness².

Less-sedating products may cause less impairment. Read labels to avoid taking two products with the same medicine.

Decongestants can ease nasal stuffiness for a short time^2,5. They are sold as pills, liquids, and nasal sprays¹⁰.

Do not use nasal decongestant sprays for more than three days^2,7. Longer use can make congestion return or become worse⁷.

Pseudoephedrine may be unsafe for some people. Concerns include high blood pressure, heart disease, stroke, or trouble urinating.

Ask a clinician whether this medicine is suitable for you. This is important if you have health problems or take other medicines.

Prescription choices include certain antihistamine nasal sprays and leukotriene inhibitors^2,8. Leukotrienes are chemicals involved in the allergic response².

Some leukotriene blockers may cause anxiety or depression². Tell your clinician about any past mental health concerns before starting them².

Allergen immunotherapy gives controlled amounts of a known trigger^2,5. It may help when avoidance and medicines do not control symptoms².

Allergy shots contain rising amounts of the relevant allergen^2,6. Over time, they can reduce the immune response that causes symptoms^5,6.

Some allergens can be treated with tablets placed under the tongue^2,5. Options include certain grass, ragweed, dust mite, and tree allergies^2,10.

Testing can help confirm the trigger before immunotherapy begins. Treatment then takes place under the care of a healthcare professional^2,6.

Allergy shots do not provide fast relief. Benefits may take about six months to appear⁸.

Schedule a visit if hay fever symptoms are severe². Seek care if treatment does not bring relief^2,3.

Medical advice is also helpful in these situations:

Tell your clinician if coughing or wheezing occurs with pollen exposure^3,6. Allergic rhinitis can worsen asthma symptoms.

Poorly controlled hay fever can interfere with sleep and daily life. Allergic rhinitis may also impair work performance^1,3.

Long-lasting congestion can raise the risk of sinus inflammation or infection. Swelling near the ear passages may also contribute to ear problems^1,7.

Children with hay fever may have middle ear infections. Allergic rhinitis can also worsen asthma coughing and wheezing.

A clinician can check for other causes when symptoms keep returning^1,3. The clinician can also review your treatment plan and possible triggers^1,5.

Seasonal allergies can affect the nose, eyes, throat, ears, and sleep^1,3. Their timing often follows tree, grass, weed, or mold exposure^3,7.

Checking pollen levels can help you plan outdoor time. Closing windows and washing after outdoor activity may also reduce exposure^5,6.

Nasal steroid sprays are the main treatment for persistent nasal symptoms^1,2. Antihistamines, short-term decongestants, and immunotherapy may help in selected cases^2,5.

Seek care when symptoms are severe or resist proper treatment^2,3. A clinician can help identify triggers and choose a suitable long-term plan^1,5.