10Allergies
People with allergies, especially seasonal forms, can be at a higher risk of developing croup. When you are exposed to some inhaled irritants, such as dust mites, pollens, and some chemicals, the upper respiratory system can be affected. As a result, inflammation would occur and cause swelling in the airways. However, the number of people with allergy-inducing coup is insignificant compared to the total cases caused by viral or bacterial infections. [10]
