Can the smell of mugwort cause bronchitis?
Generally, whether the scent of mugwort can cause bronchitis depends on individual differences and specific circumstances. If discomfort occurs, it is recommended to seek medical attention promptly. The detailed analysis is as follows:

For patients with stable bronchitis who have no history of allergy to mugwort components, exposure to mild mugwort scent typically does not cause discomfort. The low concentration of such odors, combined with a non-sensitive state of the respiratory tract, means that brief exposure generally does not irritate the airway mucosa or trigger symptoms such as coughing or wheezing. Some individuals may even find the scent soothing to their mood.
However, during an acute exacerbation of bronchitis or in individuals allergic to mugwort, the scent may provoke discomfort. At this stage, the airway mucosa is already congested and swollen, and volatile compounds from mugwort can further irritate the respiratory tract, triggering severe coughing, chest tightness, or even wheezing. Some people are particularly sensitive to the essential oils in mugwort; even low-level exposure may lead to bronchospasm and worsen the condition.
In daily life, individuals should identify their specific allergens and avoid known irritants. Maintain good indoor ventilation and regularly clean living spaces to reduce dust accumulation. Dress appropriately according to temperature changes to prevent colds that could trigger inflammation. Follow a light, nutritious diet, avoiding spicy and greasy foods, and maintain regular sleep patterns to strengthen respiratory tolerance and reduce the risk of adverse reactions.