Termites can damage the wood in homes and trees without being detected. Signs of a mild infestation include dark droppings while severe cases have brown tunnels. For mild infestations, low toxicity chemicals are injected to kill termites without harming health or leaving stains. Fumigation uses lethal gas to rid the entire home but requires vacating for a few days. Microwave heating targets infested areas and kills termites within hours without needing to leave. It is best to inspect for termites regularly to prevent severe damage requiring treatment.