The cuboid is a smaller cube shaped bone on the lateral side of the foot around about the center of the foot. The bone is a little larger than a typical gaming dice. The bone participates in 3 joints and operates as a pulley for the tendon of the peroneus longus muscle to pass under. Because this is a powerful muscle it might move the cuboid bone too much if it is not secure and overload those joints that this bone is a part of causing a disorder known as Cuboid Syndrome. This is most likely one of the more frequent causes of pain on the outside of the foot, particularly in athletes.
The pain normally starts out quite mild and is located about where the cuboid bone is on the outside of the foot. The discomfort is only to begin with present during exercise. If the activity amounts aren't reduced the condition will most likely progress and then show up after activity in addition to during. At times the pain does radiate down into the foot. While this is the most common reason for pain on the lateral side of the foot, there are others like tendon problems and nerve entrapments.
The main treatment of Cuboid Syndrome is pain relief. This is commonly achieved with a reduction in activity levels and the using of low dye strapping to immobilise and support the bone. Mobilisation and manipulation is generally used to fix the symptoms. Over the long run foot supports may be needed to limit the movement and aid the lateral arch of the foot. This helps make the cuboid more steady so it is an efficient lever or pulley for the tendon to work around. Normally this approach works in almost all cases. If it doesn’t there are no operative or more advanced methods and a further reduction in activity amounts is usually the only alternative.