Lead is a toxic metal that can cause serious health problems if it's ingested or if dust containing lead is inhaled. As long as lead paint is in good condition, and the surface hasn't been broken, the paint doesn't pose a serious health threat. The problem comes when the lead paint starts deteriorating, when lead dust and flakes of lead paint begin accumulating on surfaces such as window sills, counter tops, and floors, as well as on children's toys, clothes, and bedding. It can also contaminate soil around the house. Small children, who have a tendency to put their hands and other objects in their mouth, are at an increased risk of accumulating harmful amounts of lead in their bodies.