Termites are dangerous household pests that can cause significant damage because they eat wood secretly from within. Signs of an infestation include dark droppings on window sills or doors and mud-colored lines on woodwork. It is important to regularly monitor the entire house for termite activity. Hiring trained inspectors to examine the home is recommended, as they can detect even minor infestations. Following the inspectors' advice promptly is crucial, as termites can escalate damage over time and treatment costs rise as the infestation worsens. Both existing homes and new purchases should be thoroughly inspected for termite activity.