A termite infestation may present signs such as mud tubes visible on walls, foundations, or crawl spaces; hollow-sounding wood when tapped, indicating internal damage; frass or piles of termite droppings resembling sawdust near infested areas; and the presence of winged termites or discarded wings, especially near light sources. If you observe any of these signs, consult a pest control professional for a thorough inspection and appropriate treatment.