The most common types of mould are generally not hazardous to healthy individuals - but some moulds may be hazardous to certain individuals. People who have asthma, bronchitis, hay fever, other allergies, or have weakened immune systems are more likely to react to mould. The most common symptoms are runny nose, eye irritation, skin rash, cough, congestion and aggravation of asthma.
Symptoms usually disappear after mould exposure stops.
Most often, there are no known long-term consequences to workplace exposures. Any building may have mould. Water-damaged drywall, wood materials, jute, wallpaper, and cardboard are prone to fungal growth. All moulds need water to grow. Mould can grow anywhere there is water damage, high humidity or dampness.