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Seasonal Allergies in Seoul for Newcomers: ENT Guide from Gangnam, Seoul

🌍 Welcoming patients from around the world · Consultations in English with Dr. Kim Yoo Suk, MD, former professor at Yonsei & Ajou University

Why newcomers react to Seoul's air

People who move to Seoul often say they never had allergies before. Several factors overlap: new pollen species, dust carried from continental deserts, urban fine particulate matter and very dry winter air. Allergic rhinitis is an immune reaction to airborne allergens, while dust and pollution can irritate the nose even without true allergy. The result is similar: sneezing, runny or blocked nose, itchy eyes and postnasal drip. Symptoms often start in the second or third spring after arrival, once the immune system has been sensitized to local allergens, which is why long-term residents are sometimes surprised by a sudden onset.

Seoul's allergy calendar

• March to May: tree pollen (such as oak, birch and pine) and spring yellow dust (황사, hwangsa) from the deserts of Mongolia and northern China. This is the peak season for many people.
• June to August: monsoon humidity favors indoor mold and dust mites.
• Late August to October: weed pollen, including ragweed and Japanese hop, causes a second wave.
• Winter: fine dust episodes can occur, and dry heated air irritates the nose; see fine dust and yellow dust rhinitis.

Step by step: managing your first allergy season

1. Check air quality daily. Korean weather apps and the government's air quality service report PM10, PM2.5 and pollen levels.
2. Wear a certified mask (KF80 or KF94) on high-dust days.
3. Keep windows closed on bad days and consider an air purifier at home.
4. Rinse your nose with saline after spending time outdoors.
5. Shower and change clothes after coming in on high-pollen days.
6. Start medication early. If you know your season, nasal steroid sprays are most effective when started before symptoms peak, because they take several days to reach full effect.

When to see an ENT

See a doctor if over-the-counter remedies do not help, symptoms affect sleep or work, you develop facial pain or thick discharge suggesting sinusitis, you have asthma symptoms such as wheezing, or you lose your sense of smell. Constant use of decongestant sprays is another reason to get help.

Diagnosis and treatment at our clinic

Our approach to allergic rhinitis follows the international ARIA guidelines: allergen avoidance, medication and, when needed, surgery. An allergy test identifies which allergens you react to, and endoscopy checks the nasal lining and turbinates. Options include nasal steroid sprays and antihistamines, and for dust mite allergy, sublingual immunotherapy, a daily tablet taken over a long period. When permanently swollen turbinates keep the nose blocked despite medication, turbinate reduction under local anesthesia may be considered.

About Dr. Kim

Dr. Kim Yoo Suk is a board-certified otolaryngologist, former Yonsei and Ajou University professor and rhinology subspecialist. He is a member of the Korean Academy of Asthma, Allergy and Clinical Immunology and has published research on allergy skin reactivity. He consults in English and treats all ear, nose and throat conditions.

Newly arrived expats can also read our expat guide. Learn about visits on our English-speaking ENT page, find directions on the location page, or visit the International Patients hub.

Frequently asked questions

Why did I develop allergies after moving to Seoul?

New pollen species, desert dust, fine particulate pollution and dry air can all trigger nasal symptoms. Some people develop true allergies to new allergens, while others have irritation from dust and pollution. An allergy test helps distinguish the two and guides treatment.

Do KF94 masks help with allergies?

Certified KF80 and KF94 masks filter fine particles and can reduce exposure to pollen and dust when worn properly. They are most useful on high fine-dust or pollen days, outdoors or during commutes. They complement, but do not replace, medical treatment for allergic rhinitis.

Is sublingual immunotherapy suitable for foreigners?

It can be, but it is a long-term treatment taken daily, typically for years, and is mainly used for dust mite allergy. It suits people planning to stay in Korea or able to continue treatment at home. Discuss your plans with Dr. Kim before starting.

General information for international patients, reviewed by an ENT specialist. Insurance coverage and claim rules depend on your own insurer — please check with them. In an emergency in Korea, call 119.