Allergic Rhinitis Symptoms and Care as Seasons Change
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Allergic rhinitis is managed by reducing exposure to triggers and using medication. This guide covers clues for distinguishing it from a cold, how to use nasal sprays, nasal rinse safety, and symptoms that require medical attention.

- Recurring clear nasal discharge, sneezing, and itching in the nose and eyes are clues to allergic rhinitis.
- Colds can also cause clear nasal discharge, so do not judge the cause by its color alone.
- Antihistamines and nasal corticosteroids are selected based on symptoms and treatment response.
- For nasal rinsing, you must use distilled or sterile water, or water that has been boiled and cooled.
- Nasal congestion that disrupts sleep or a persistent reduction in the sense of smell requires medical attention.

Allergic rhinitis is managed by avoiding triggers and controlling inflammation with medication. It may be suspected if a clear runny nose and sneezing recur as the seasons change. The color of nasal mucus alone cannot confirm the diagnosis. Seek medical care if symptoms disrupt your sleep.
The humidity figures are based on the 2013 guidelines, and the observation time after injections is based on the 2023 guidelines.

Causes and Symptoms of Allergic Rhinitis
Allergic rhinitis is a condition in which an immune response to certain substances causes inflammation in the nose. These substances are called allergens. Common examples include pollen, dust mites, animal dander, and mold.
When the body reacts to an allergen, it releases substances such as histamine. This response causes sneezing and a clear runny nose. Swelling of the nasal lining also causes congestion. Itching of the eyes or nose may occur as well.
AAAAI's guide to rhinitis distinguishes between seasonal and year-round causes. Seasonal rhinitis is most noticeable when pollen is in the air. Year-round rhinitis can occur throughout the year because of indoor allergens. The two patterns can overlap.

Spring pollen: Tree pollen, including birch, oak, and alder
Summer pollen: Grass pollen, including lawn grasses
Fall pollen: Weed pollen, including ragweed, mugwort, and Japanese hop
Indoor allergens: Dust mites, pet dander and saliva, and mold

Pollen seasons vary by region and weather. Fine particulate matter and tobacco smoke are irritants that worsen symptoms. Sudden temperature changes can also make nasal symptoms worse. Temperature changes alone do not determine whether symptoms are allergic.

Comparing Colds and Allergic Rhinitis
Itching and patterns of repeated exposure are clues that help distinguish allergic rhinitis. Colds also cause sneezing and nasal congestion. Because the symptoms overlap, a single feature is not enough to confirm the diagnosis.

Feature
Allergic rhinitis
Cold

Cause
Immune response to a specific allergen
Respiratory viral infection

Nasal mucus
Clear, watery mucus is common
May be clear at first and change color later

Itching
Itchy nose and eyes are common clues
Not a typical distinguishing clue

Fever
Rhinitis itself does not cause fever
May occur, but is often absent

Other symptoms
Watery eyes, repeated sneezing
Sore throat, cough, and other symptoms

Recurring pattern
Recurs in certain seasons or places, or after exposure
Develops and improves as the infection runs its course

CDC's guide to the common cold explains changes in nasal mucus color. Yellow or green nasal mucus can occur during a cold. A color change alone does not mean antibiotics are needed. You can also catch a cold while you have allergic rhinitis.

Symptom Patterns by Situation
Recording the places and seasons in which symptoms recur can help identify the cause. Allergy testing uses skin tests or blood tests. Results are interpreted alongside actual exposure patterns.

When symptoms occur
Possible cause to check
What to tell your healthcare provider

Worsen after outdoor activities in a particular season
Pollen allergy
The seasons when symptoms recur and where activities take place

Worsen in the bedroom or while handling bedding
Indoor allergens such as dust mites
How symptoms differ by location

Sneezing and itching after contact with animals
Animal allergens
The relationship between contact and the onset of symptoms

Worsen in cold air or around strong fragrances
Rhinitis symptoms caused by irritants
The relationship to temperature and odors

Persistent nasal congestion regardless of season
Structural problems or causes other than rhinitis
Whether one or both sides are affected, and changes in smell

This table is a guide for preparing for a consultation, not a diagnostic tool. ENT Health's guide to rhinitis also explains nonallergic causes. Even if an allergy test is positive, other causes may be present as well.
The Korea Disease Control and Prevention Agency's guidelines for preventing and managing allergic rhinitis provide the following advice.

Identify the causes and aggravating factors of rhinitis through testing, then avoid them.

Comparing Rhinitis Medications
Treatments are selected mainly according to the symptoms that bother you and your response to previous treatment. If nasal congestion persists, consider treatment to control nasal inflammation. Before changing medication, also check how it has been used and for how long.

Treatment type
Main role
What to check

Oral antihistamines
Relieve sneezing, a clear runny nose, and itching
Drowsiness and overlapping ingredients in other medicines

Antihistamine nasal sprays
Relieve nasal allergy symptoms
Product-specific instructions and side effects

Nasal steroids
Control nasal inflammation, congestion, and other overall symptoms
Regular use, nosebleeds, and local irritation

Vasoconstrictor decongestant nasal sprays
Provide short-term relief of nasal congestion
Limits on consecutive use and worsening congestion with overuse

Saline sprays and rinses
Help remove mucus and irritants
Safe rinsing water and device hygiene

ACAAI's treatment guide warns about drowsiness from antihistamines. Do not drive if you have taken medication that can cause drowsiness. You should also avoid operating dangerous machinery. Alcohol can increase the sedating effect.
Do not take multiple antihistamines without a doctor's instructions. Cold medicines may contain the same ingredients. Ask for advice on choosing medication for children or during pregnancy or breastfeeding. Also mention any other conditions or medications.
Nasal steroids can take time to work, depending on the product. Use them regularly as prescribed or directed in the instructions. NHS guidance on steroid nasal sprays explains the risks of excessive or long-term use. Do not increase the recommended dose on your own.

Common Mistakes When Using Nasal Sprays
Treating all sprays for nasal congestion as the same medication can lead to mistakes about how long to use them. Nasal steroids and vasoconstrictor sprays work differently. NHS guidance on rhinitis warns against overusing vasoconstrictors. Prolonged use can actually make congestion worse.
For instructions on using nasal steroid sprays, see the MedlinePlus guide. Follow the product instructions or prescription for the actual dose. It is best to aim the spray away from the nasal septum, the wall in the center of the nose.

Wash your hands and gently blow your nose.
Shake the container and prepare the spray according to the instructions.
Do not tilt your head back.
Point the nozzle toward the outer wall of the nostril.
Breathe in slowly and spray only the prescribed number of times.
Do not blow your nose immediately after spraying.

Nosebleeds or dryness may be side effects of nasal steroids. If they recur, ask your healthcare provider to check the spray direction and dose. Seek medical care immediately if you develop changes in vision or breathing problems. These are warnings in the NHS guidance on steroid nasal sprays.

Managing Triggers at Home and Indoor Humidity
Home management is best tailored to your confirmed allergens. You do not need to replace all your bedding or furniture at once. Adjust exposure-reduction measures and medication together.

Cause or situation
Changes to make in daily life

Days with high pollen levels
Reduce outdoor activities and pollen entering the home, and wash after going outside

Dust mite allergy
Use mattress and pillow covers, wash bedding, and manage dust and humidity

Animal allergy
Keep animals out of the bedroom and wash your hands after contact

Mold and condensation
Address sources of moisture and leaks, and ventilate

Air pollution and tobacco smoke
Reduce exposure on heavily polluted days, stop smoking, and avoid secondhand smoke

Humidity Guidelines for Dust Mite Allergy
An indoor relative humidity of 35~50% is recommended for dust mite control. This figure comes from the 2013 dust mite management guidelines. This does not mean the same humidity is recommended for everyone with rhinitis. Check the current humidity with a hygrometer before turning on a humidifier.
Wash bedding regularly after checking the fabric's care label. These guidelines warn against raising the household hot water temperature for washing. This is because of the risk of scalds from hot water. Also use mite-proof covers and clean regularly.
An air purifier alone will not resolve a dust mite allergy. The same guidelines explain that the effect of air filtration alone on symptoms is uncertain. Areas where allergens collect, such as bedding and dust, also need attention.

Safety Rules for Nasal Rinsing Water and Devices
Use distilled or sterile water, or water that has been boiled and cooled, for nasal rinsing. Do not put untreated tap water into your nose. Water that is safe to drink is not necessarily safe for nasal rinsing.
CDC's July 2025 guidance on nasal rinsing warns about the risk of infection. Putting contaminated water into the nose can, in rare cases, cause a fatal infection. Adding salt alone does not sterilize water.

Check the label to confirm that the water is suitable for nasal rinsing. Let boiled water cool before use.
Wash your hands and make sure the device is clean and completely dry.
Follow the product instructions for the amounts of rinsing powder and water.
Rinse according to the device's instructions.
After use, clean the device and dry the inside before storing it.

 FDA's guide to nasal rinsing devices recommends that people with weakened immune systems seek advice before use. For children, ask a healthcare provider whether the device is appropriate for their age. Seek medical care if symptoms worsen or a nosebleed occurs after rinsing.
Seek medical care immediately if you develop a headache, fever, confusion, or vomiting after rinsing. These are CDC's criteria for seeking immediate care. Nasal rinsing is a way to help manage rhinitis. It is not a reason to stop necessary medication on your own.

When to Consider Immunotherapy or Surgery
If the allergen has been identified and symptoms are difficult to control, you can discuss immunotherapy. Medication side effects and exposure that is difficult to avoid are also considered. Surgery is decided on after evaluating the problems causing nasal blockage.

Treatment
Goal
When to consider it
Limitations

Allergen immunotherapy
Reduce hypersensitivity to a specific allergen
The allergen is confirmed and symptoms are difficult to control with existing management
Requires continued treatment and management of side effects

Surgery
Improve structural blockage or related conditions
Severe nasal congestion that does not improve with medication, among other situations
Does not guarantee elimination of the allergic response itself

Immunotherapy involves administering an allergen in a prescribed way. It can be given by injection or under the tongue. The Korean Academy of Asthma, Allergy and Clinical Immunology's 2023 guidelines explain patient selection and safety management.
Injection immunotherapy carries a risk of a severe systemic allergic reaction. It must be given at a medical facility equipped to provide emergency treatment. The guidelines recommend observation for at least 30 minutes after an injection. Report any worsening of asthma or changes in your health before the injection.
ENT Health's guide to rhinitis explains procedures and surgery for symptoms that do not respond to medication. Whether to have surgery is decided through an ear, nose, and throat evaluation. Continue any necessary allergy management after surgery.

Can Sword Bean Tea and Probiotics Replace Treatment?
There is not enough evidence to recommend sword bean tea or probiotics instead of standard rhinitis treatment. Be wary of promises that a particular food can change your tendency to develop allergies. Research on food ingredients does not automatically mean they have a treatment benefit in humans.
The 2020 rhinitis practice guidelines explain the lack of evidence for herbal products. These guidelines do not prove that sword bean tea works. Assessing a treatment's effectiveness requires clinical evidence on that particular product.
The U.S. NCCIH's guide to complementary approaches explains the limitations of probiotic research. Some studies have found improvements in certain symptoms. However, the findings are inconsistent. Effects may also vary by strain and product.
Research on gut microbes alone cannot establish the cause of an individual's rhinitis. Do not conclude that processed foods or antibiotics caused your rhinitis. If you take supplements, tell your healthcare provider the product names and ingredients.

Symptoms That Need Medical Care and Preparing for a Consultation
Symptoms that interfere with sleep or daily life are a reason to seek medical care. NHS guidance on rhinitis also recommends seeking advice in these cases. If symptoms do not improve with medication, the diagnosis and treatment should be reassessed.

Frequently waking up because of nasal congestion
Symptoms that persist or worsen despite medication
Persistent facial pain or pressure, or a reduced sense of smell
New asthma symptoms or worsening of existing asthma
An unclear cause or persistent congestion on one side

Nasal congestion can reduce sleep quality. Lack of sleep can lead to daytime fatigue and poor concentration. It is inaccurate to explain this directly as a lack of oxygen to the brain.
Postnasal drip is mucus running down the back of the throat. It can occur with rhinitis. If it is accompanied by facial pressure or a reduced sense of smell, conditions such as sinusitis are evaluated. Rhinitis does not necessarily progress to sinusitis.
Nasal polyps are soft, fluid-filled growths inside the nose. They can cause nasal congestion and a reduced sense of smell. NHS guidance on nasal polyps recommends seeking medical care if your sense of smell changes. Do not assume that a reduced sense of smell means permanent nerve damage.
Prepare the following information before your consultation.

Write down when symptoms began and the seasons in which they recur.
Record the places and exposure situations in which symptoms worsen.
Prepare the names of medications you have used and how long you used them.
Explain how nasal congestion affects your sleep.
Also report changes in smell and whether you have a cough or wheezing.

FAQ
Q. Does a clear runny nose mean I have allergic rhinitis?
A. A clear runny nose alone is not enough to tell. A clear runny nose can also occur in the early stages of a cold. Repeated sneezing, itching, and the circumstances of exposure are assessed together.
Q. Do I need antibiotics if I have yellow nasal discharge?
A. The need for antibiotics is not determined by the color of nasal discharge alone. Nasal discharge can turn yellow or green even with a viral cold. The course of symptoms and examination findings are assessed together.
Q. Is rhinitis during seasonal changes always caused by a pollen allergy?
A. Nonallergic rhinitis can also occur in response to temperature changes or irritants. Indoor allergens may also be the cause. Symptoms and test results need to be assessed together.
Q. Does a positive allergy test confirm the cause?
A. A positive result is interpreted alongside the symptoms that occur during actual exposure. Allergic and nonallergic causes may coexist. Work with your healthcare provider to decide what management measures are appropriate for your test results.
Q. Can I use a nasal spray every day?
A. Directions for use vary depending on the ingredients. Nasal steroids are used regularly as prescribed. Overusing vasoconstrictor nasal sprays can worsen nasal congestion.
Q. Are nasal steroids free of systemic side effects?
A. It cannot be stated with certainty that there are no systemic side effects at all. Excessive doses or long-term use may increase the risk. If nosebleeds or irritation recur, check how you are using the medication.
Q. Can I drive right away after taking an antihistamine that causes less drowsiness?
A. The effects on drowsiness and reaction time vary by medication and individual. Check the driving precautions in the medication instructions. Do not drive if you have taken medication that can cause drowsiness.
Q. Can I rinse my nose with bottled water or water from a water purifier?
A. Whether water is safe to drink is not enough to determine whether it is safe for nasal rinsing. Use distilled water, sterile water, or water that has been boiled and then cooled. Keep your rinsing device clean as well.
Q. Should I keep a humidifier running all the time if I have rhinitis?
A. First, check the current humidity and identify the allergens causing your symptoms. Dust mite management guidelines recommend a relative humidity of 35~50%. This is the dust mite management standard from the 2013 guidelines.
Q. Will surgery for rhinitis also get rid of my allergy?
A. Surgery does not eliminate the allergic reaction itself. Surgery is considered to improve structural blockages or coexisting conditions. Continue any necessary management after surgery.
Q. How does allergen immunotherapy differ from regular rhinitis medication?
A. Immunotherapy is a treatment that reduces hypersensitivity to specific allergens. The allergens causing symptoms and suitability for treatment are assessed first. Injection treatment is given at a medical facility equipped to respond to severe allergic reactions.
Q. Can sword bean tea or probiotics replace rhinitis medication?
A. There is not enough evidence to support replacing standard treatment. Findings from studies on probiotics are inconsistent. The effectiveness of sword bean tea should be verified through clinical evidence for the specific product.
Q. If I lose my sense of smell because of rhinitis, is it permanent?
A. A reduced sense of smell alone is not enough to conclude that there is permanent damage. Causes such as nasal congestion or nasal polyps need to be evaluated. If changes in your sense of smell persist, seek medical care.

Sources
- Korea Disease Control and Prevention Agency National Health Information Portal, Allergy Prevention and Management Guidelines, April 2022: https://health.kdca.go.kr/healthinfo/biz/health/ntcnInfo/healthSourc/thtimtCntnts/thtimtCntntsView.do?thtimt_cntnts_sn=25
- AAAAI, Hay Fever / Rhinitis: https://www.aaaai.org/conditions-treatments/allergies/hay-fever-rhinitis
- CDC, Preventing and Treating Common Cold: https://www.cdc.gov/antibiotic-use/media/pdfs/Common-Cold-P.pdf
- ENT Health, Rhinitis, reviewed February 2024: https://www.enthealth.org/conditions/rhinitis/
- ACAAI, Hay Fever: Symptoms and Treatment: https://acaai.org/allergies/allergic-conditions/hay-fever/
- NHS, Allergic rhinitis, reviewed January 8, 2026: https://www.nhs.uk/conditions/allergic-rhinitis/
- NHS 111 Wales, Steroid nasal sprays: https://111.wales.nhs.uk/Encyclopaedia/s/article/steroidnasalsprays
- MedlinePlus, Nasal corticosteroid sprays: https://medlineplus.gov/ency/patientinstructions/000404.htm
- Environmental assessment and exposure control of dust mites: a practice parameter, 2013: https://www.aaaai.org/Aaaai/media/Media-Library-PDFs/Allergist%20Resources/Statements%20and%20Practice%20Parameters/Dustmite-2013.pdf
- FDA, Is Rinsing Your Sinuses With Neti Pots Safe?: https://www.fda.gov/consumers/consumer-updates/rinsing-your-sinuses-neti-pots-safe?source=govdelivery
- CDC, How to Safely Rinse Sinuses, July 16, 2025: https://www.cdc.gov/naegleria/prevention/sinus-rinsing.html?CDC_AAref_Val=https%3A%2F%2Fwww.cdc.gov%2Fparasites%2Fnaegleria%2Fritual-ablution.html
- KAAACI Guidelines for Allergen Immunotherapy, 2023: https://www.e-aair.org/DOIx.php?id=10.4168/aair.2023.15.6.725
- Rhinitis 2020: A practice parameter update: https://www.aaaai.org/Aaaai/media/Media-Library-PDFs/Allergist%20Resources/Statements%20and%20Practice%20Parameters/Rhinitis-2020-A-practice-parameter-update.pdf
- NCCIH, Seasonal Allergies and Complementary Health Approaches: https://www.nccih.nih.gov/health/providers/digest/seasonal-allergies-and-complementary-health-approaches
- NHS, Nasal polyps: https://www.nhs.uk/conditions/nasal-polyps/?src=conditionswidget

Images
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