Which of the following is an exacerbating condition for asthma?

• A. Bacterial pneumonia
• B. Pulmonary edema
• C. Pneumothorax
• D. Allergic Asthma (Atopic Skin, Allergies, AERD)

Answer: (D)

Allergic sensitization drives many asthma flares. In allergic asthma, exposure to environmental allergens triggers an IgE-mediated response with mast cell degranulation in the airways. This releases histamine, leukotrienes, and other mediators that cause rapid bronchoconstriction, airway edema, and mucus production, leading to an exacerbation of symptoms. This is why patients with atopy—such as allergic rhinitis or atopic dermatitis—and patterns like aspirin-exacerbated respiratory disease often have more frequent or severe asthma flares. Other conditions listed, like pneumonia, pulmonary edema, or pneumothorax, can worsen breathing but are not the specific immunologic triggers that exacerbate asthma itself.