The term COMMON SPRAIN SPOT is referring to the ANKLE, which is a five letter word. The ANKLE is one of the most commonly sprained joints in the body due to its frequent use and the fact that it is a weight-bearing joint. It is also one of the most vulnerable joints in the body due to its complex structure and the fact that it is constantly in motion. The ANKLE is made up of three bones, the tibia, fibula, and talus, which are connected by ligaments and tendons. These ligaments and tendons can become stretched or torn when the ANKLE is twisted or turned too far, resulting in a sprain.