dr. chirawat chiewchalermsri
Academic Chair, Thai Asthma Council. Specialist in allergic rhinitis, asthma, chronic cough, urticaria and drug allergy with international publications.

Academic Chair, Thai Asthma Council. Specialist in allergic rhinitis, asthma, chronic cough, urticaria and drug allergy with international publications.


A chronic cough is not a minor issue. If the cough persists for more than 8 weeks, it may be a sign of allergic rhinitis, asthma, or eosinophilic bronchitis. This article explains the causes, symptoms, warning signs, diagnostic methods, and treatment approaches that can stop the cough by addressing the underlying cause.

Drug allergy is a reaction in which the immune system responds abnormally to a medication. It can occur in both acute and non-acute forms. If not clearly diagnosed, it may lead to missing out on necessary medications in the future and pose a risk of severe danger. This article summarizes symptoms, causes, diagnostic methods, and safe management strategies.

Allergic reactions to penicillin are caused by abnormal immune responses. Symptoms range from rashes, itching, and swelling to shock, which can be life-threatening. It is recommended to be assessed by a doctor for an accurate diagnosis.

Regardless of the season, when the weather changes – unpredictably sunny, rainy or cold – it can trigger your allergies.


PM 2.5 are polluted particles in the air that are extremely small. Once you inhale these particles deep into your bronchial tract, your trachea and alveoli (air sac) will become inflamed. This will be very harmful to your respiratory system, and even worsen the conditions in allergy patients.