When mould spores land on a damp surface, they can grow and reproduce, causing mould growth. Mould can grow on a variety of surfaces, including wood, paper, fabric, and even on some types of food.
This can cause a range of health problems, especially for people with allergies or respiratory issues. Exposure to mould can cause symptoms such as coughing, sneezing, wheezing, and headaches. It can also aggravate existing conditions such as asthma or chronic obstructive pulmonary disease (COPD).