Prevention is better than cure
Damp or water damage can create mold, the most common causes of mold growing on walls are high humidity, condensation and water leaks (which are often hidden inside the wall). Condensation forms when water vapor in the air meets cold surfaces and cools to become liquid. Condensation is especially common on walls which form the perimeter of a house.
Mold and your health
Exposure to damp and moldy environments may cause a variety of health effects. Mold can cause nasal congestion, throat irritation, coughing or wheezing, and in some case eye or skin irritation. People with mold allergies may have more severe reactions.
Exposure to mold through skin contact or inhalation, can result in allergic reactions, infections or toxic (poisonous) effects. The associated symptoms range from a rash, cold and flu-like effects to neurological damage and even death.
In some cases, indoor mold growth may not be obvious. Ensure that you inspect your home for possible mold!