Allergy Treatment in Bangkok | Rhinitis, Asthma + Anaphylaxis Care

Allergy treatment in Bangkok is a year-round need for residents, expats, and travelers seeking to protect their health in a tropical city. The city’s warm humid climate, year-round dust mite exposure, seasonal haze and PM2.5 air pollution, and a rich food culture mean allergic rhinitis, asthma, atopic dermatitis, food allergies, drug reactions, and insect-sting allergies are all common presentations at our clinic. At Take Care Clinic on Sukhumvit Soi 13, the medical team offers a comprehensive range of services including walk-in assessment, allergy testing referral, symptom control, and ongoing care for both adults and children, with referral to a hospital-based allergy and immunology center when specialist immunotherapy or in-patient management is needed. This page explains how the diagnosis works, what testing involves, and the medical options we provide.

Common allergies in Bangkok

Allergic rhinitis is by far the most frequent reason patients present. The trigger in Bangkok is rarely seasonal pollen (as in temperate countries) but year-round indoor allergens: dust mites in mattresses and soft furnishings, cockroach allergen in older buildings, mould in air conditioning, and animal dander. Symptoms include persistent sneezing, runny nose, blocked nose, itchy eyes, post-nasal drip, sore throat in the morning, and disrupted sleep. Many newcomers attribute these symptoms to a cold, a flu-like illness, or to air pollution; an experienced family doctor can usually distinguish allergic from infectious causes within a focused visit, separating allergic rhinitis from bronchitis or a febrile illness.

Asthma frequently overlaps with rhinitis (the “united airway” concept). Symptoms include cough, wheeze, breathlessness, and night-time waking. Bangkok’s PM2.5 peaks in dry season worsen asthma control across the city. Atopic dermatitis (eczema) presents as itchy, dry, scaly patches on the flexures and is often worse in air-conditioned environments, and may overlap with other causes of itchy skin infection after scratching. Food allergy in adults is uncommon but real (shellfish, tree nuts, peanut, sesame); in children, cow’s milk, egg, wheat, and soy are the typical culprits. Drug allergy presents with rash, urticaria, angioedema, or in severe cases anaphylaxis. Insect-sting allergy is uncommon but life-threatening when it occurs, and is closely related to the wider topic of bite reactions covered on our insect bite service page.

How we diagnose at the clinic

Diagnosis starts with a detailed history. A patient who can describe what triggers symptoms, what relieves them, how long they have been going on, and what they have already tried gives the clinician most of the answer. Physical examination focuses on the nose, throat, chest, and skin. In children we also check growth and ENT structure.

Blood tests are useful when the history is unclear. Total IgE and specific IgE blood tests (sIgE, also known as ImmunoCAP) measure antibodies to particular allergens including house dust mite, cockroach, animal dander, mould, common foods, and grass and tree pollens. The clinic draws blood on site and sends samples to a hospital diagnostic laboratory; results return in 3 to 7 days. Skin prick testing is more sensitive but requires specialist allergy clinic facilities; we refer patients who need a comprehensive skin prick panel to a hospital allergy center where the test can be safely performed with rescue medication on hand.

For asthma, we perform peak flow measurement and arrange spirometry through a partner facility. For food allergy in adults, supervised oral food challenges remain the gold standard for confirming or excluding an uncertain reaction, and are performed only in hospital-based centers because of the risk of anaphylaxis.

Treatment, the practical options

Treatment depends on the diagnosis. For allergic rhinitis the standard stepped care includes second-generation oral antihistamines (cetirizine, loratadine, fexofenadine, bilastine), intranasal corticosteroid sprays (fluticasone, mometasone, budesonide), saline nasal irrigation, and (for difficult cases) combination intranasal corticosteroid plus antihistamine spray. Oral decongestants help short-term but are not for long-term use. Eye drops for ocular itch are added as needed.

For asthma we follow GINA guidelines: inhaled corticosteroid (ICS) and ICS plus long-acting beta-agonist (LABA) combinations, with short-acting reliever inhalers (salbutamol) for symptom episodes. Inhaler technique is reviewed and corrected at every visit because more than half of patients use their inhalers incorrectly. Action plans are provided so patients know when to step up therapy and when to seek urgent help. For atopic dermatitis we prescribe daily emollients, topical corticosteroids of appropriate strength by body site, calcineurin inhibitors (tacrolimus or pimecrolimus) where steroids are limited, and identify any contributing triggers.

For food and drug allergy, definitive treatment is avoidance, supported by patient education and (for life-threatening reactions) an adrenaline auto-injector prescription. Allergen immunotherapy (sublingual or subcutaneous), which gradually desensitises the immune system to dust mite or other allergens, is offered through hospital-based allergy and immunology services in Bangkok for patients with persistent symptoms despite optimal medical therapy; we refer appropriate candidates and coordinate ongoing care.

Children with allergies

Children commonly present with allergic rhinitis, asthma, atopic dermatitis, and food allergy. The clinic provides paediatric assessment, weight-based dosing, and family-centred education on trigger avoidance. International school-aged children in Bangkok often need allergy action plans for school, written in English, identifying triggers, medications, and emergency steps including adrenaline auto-injector use. We provide these on request, in standardised formats accepted by the major international schools in the city.

Anaphylaxis and severe allergic reactions

True anaphylaxis (rapid-onset airway, breathing, or circulation involvement after exposure to a known or suspected allergen) is a medical emergency. Intramuscular adrenaline into the lateral thigh is the only proven life-saving treatment; antihistamines and steroids are second-line. Any patient with previous anaphylaxis should carry an adrenaline auto-injector at all times and have a written action plan. The clinic stocks adrenaline auto-injectors and can prescribe them; we also provide training in correct use, signs to act on, and what to tell others (family, hotel staff, restaurants).

If you experience throat swelling, difficulty breathing, sudden hives plus dizziness, or collapse after a food, drug, or sting exposure, use your adrenaline auto-injector immediately and call 1669 for the Thai national ambulance.

Air quality, PM2.5, and allergy control in Bangkok

From November through April, Bangkok’s PM2.5 levels rise sharply and aggravate allergic rhinitis and asthma. Practical measures include checking daily air quality readings, running HEPA-filter air purifiers in bedrooms, keeping windows closed during high-PM days, wearing N95 (KN95) masks outdoors during peaks, and stepping up controller asthma medication on bad days as part of an agreed action plan. We discuss seasonal management with every allergy patient.

Pre-travel and pre-procedure considerations

Patients with significant allergy who plan dive trips, jungle treks, or trips to remote provinces should carry adrenaline if indicated, antihistamines, and an action plan in English (and ideally Thai). Patients undergoing surgery or contrast imaging should disclose any drug allergy in advance; we provide letters detailing the reaction and culprit drug. Patients on immunotherapy who travel internationally need a letter from their treating doctor and arrangements for ongoing dosing.

When to seek urgent care

Same-day clinic review is needed for sudden severe wheeze unresponsive to a reliever inhaler, rapidly worsening rash with facial swelling, suspected drug reaction with widespread rash, or any allergic reaction occurring near the airway. Patients who develop true anaphylaxis (breathing difficulty, dizziness, collapse) need adrenaline immediately and transfer to a hospital. The clinic provides walk-in urgent care for acute non-anaphylactic presentations during business hours. For severe systemic reactions we coordinate with international hospital allergy and immunology centers including Bumrungrad, Bangkok Hospital, and Samitivej.

Why patients choose Take Care Clinic

The clinic provides English-language allergy assessment, comprehensive blood-based diagnostic testing, prescriptions for inhalers, nasal sprays, topical creams, antihistamines, and adrenaline auto-injectors, paediatric and adult care, hospital referral for skin prick testing and immunotherapy, and follow-up review to refine treatment. For patients who cannot travel to the clinic, our in-room doctor visits bring consultation and prescriptions to your hotel or condo across central Bangkok. We also offer IV drip therapy for hydration and supportive care when an allergic illness has caused significant dehydration or fluid loss.

Frequently asked questions

Do I need allergy testing? Not always. If the trigger is obvious (e.g., a cat in your apartment) and avoidance plus medication control symptoms, testing adds little. Testing helps when triggers are uncertain, when symptoms persist despite treatment, or when immunotherapy is being considered.

Is allergy blood testing accurate? Specific IgE testing is reliable for inhalant allergens (dust mite, animal dander, pollen, mould). For food allergy, blood testing has more false positives and a careful history matters more than a simple positive test.

Will I need to take antihistamines forever? Many patients with chronic allergic rhinitis stay on daily antihistamines or intranasal steroids during peak seasons. The newer non-sedating antihistamines are safe long-term. Immunotherapy can reduce dependence over 3 to 5 years.

Can children take adult allergy medications? Some yes, in weight-appropriate doses; others no. We use paediatric formulations and dose by weight at the clinic.

Are Thai pharmacy antihistamines the same as Western ones? The active ingredients are usually identical (cetirizine, loratadine, fexofenadine). Brand names differ. Always check the active ingredient, not the brand.

What if I think I have a drug allergy? Mention every drug you have reacted to (and what happened) at consultation; we record it in your file and provide a written allergy alert for hospitals and travel insurance.

References

1. Global Initiative for Asthma (GINA). Global strategy for asthma management and prevention, latest annual update. ginasthma.org
2. ARIA (Allergic Rhinitis and its Impact on Asthma) guidelines. International consensus on diagnosis and management of allergic rhinitis, latest revision.
3. Muraro A et al. EAACI guidelines on anaphylaxis: 2021 update. Allergy. 2022;77(2):357-377.
4. Sicherer SH, Sampson HA. Food allergy: a review and update on epidemiology, pathogenesis, diagnosis, prevention, and management. J Allergy Clin Immunol. 2018;141(1):41-58.
5. Thai Society of Allergy, Asthma and Immunology. Clinical practice guidelines for allergic rhinitis and asthma in Thailand, current edition.
6. World Allergy Organization. Position papers on allergen immunotherapy and anaphylaxis, latest editions. worldallergy.org

Medically reviewed by Dr Ponlawat Pitsuwan, MD.