Termites are very small, and most of them spend their lives underground, which can make them hard to spot. However, they do leave behind tell-tale signs. If you notice any signs of termites, such as mud tubes, blisters in wood flooring, droppings (resembling sawdust or coffee grounds), discarded wings or hollow wood, you could very well have termites. Even if you don't see termites or evidence of termites, every homeowner should have their house inspected annually for termites.