Could black mold be causing my husband's symptoms?« Back to Previous Page

Yes, the black mould in your closet could very well be causing your husband's symptoms. The timing of his stuffy nose and headaches appearing after the heavy fog is a significant clue. High humidity events like the recent fog cause indoor moisture levels to spike, which allows dormant mould spores to activate and release mycotoxins and allergens into the air. His symptoms resolving when he leaves the home strongly point to an indoor environmental cause.

In Dubai's climate, exterior walls are common sites for mould growth due to a phenomenon called condensation. The wall likely gets cold from year-round AC, and when humid outdoor air (like from the fog) meets that cold surface, water condenses inside the wall cavity, creating the perfect damp environment for mould. Cladosporium and Aspergillus are two common black-coloured moulds frequently identified in such scenarios here, and both are known to cause the exact allergic and irritant symptoms you describe.

This situation warrants a professional inspection. The urgency is high because the visible patch is likely just the tip of the iceberg; the main colony is often hidden within the wall. A certified inspector will use a borescope to check inside the wall cavity and conduct air quality testing to identify the mould species and spore concentration. This is crucial for determining the correct remediation protocol. Do not attempt to clean it yourself with bleach, as this can agitate the colony and cause a significant release of spores, potentially making his symptoms much worse. Proper remediation involves containing the area, removing the contaminated materials, and addressing the underlying moisture source to prevent it from returning.