Mould spores are a recognised asthma trigger, causing airway inflammation, increased mucus production, and bronchoconstriction. People with mould-sensitive (allergic) asthma often experience episodes of wheezing, coughing, and shortness of breath when exposed to damp or mouldy environments. Proper asthma management includes medication, plus mould prevention measures (e.g. dehumidifiers, leak repairs).