Cuboid syndrome is a reasonably common problem on the outside of the foot commonly seen in athletes. The cuboid bone is a small bone just in front of the heel bone and behind the base of the fifth metatarsal. It acts as a pulley for the tendon of the peroneus longus muscle which is a very strong muscle. As this is a strong muscle it does require that the cuboid bone be very stable to act as a pulley for the tendon. If the bone is not stable it will tend to move when this muscle contracts straining the joints around the bone. This is what cuboid syndrome is. The treatment for cuboid syndrome is generally in the short term to mobilise the bone and treat the symptoms and in the long term is to use interventions to increase the stability of the cuboid bone so the strain does not happen to the joints around the bone.