Mold reproduces by releasing tiny spores into the air, which can settle on various surfaces and grow when they find suitable conditions. Indoor mold growth is typically a result of excessive moisture, water damage, or high humidity levels. It can be found in areas such as bathrooms, kitchens, basements, or any other areas prone to dampness or water intrusion. 

Mold can cause various health issues, especially when individuals are exposed to high concentrations or have underlying sensitivities or respiratory conditions. The severity of health effects can vary from person to person: