Why might a leopard gecko's tail fall off and what should be done if it happens?

A leopard gecko's tail may fall off due to stress, injury, or as a defense mechanism to escape from predators. If a leopard gecko's tail falls off, it is important to keep the wound clean and monitor for signs of infection. The gecko will eventually regrow its tail, but it is important to provide a stress-free environment and proper care to prevent future tail loss.