There are a number of sources of ankle pain: sprains (which themselves come in two varieties inversion and eversion, whether the foot is twisted inward or outward, respectively, resulting in the excessive stretching of the ligament opposite to the direction of the twist), tendonitis of the Achilles tendon, rupture of the Achilles tendon, osteoarthritis, gout, psoriatic arthritis, rheumatoid arthritis, bursitis, broken ankle and stress fractures immediately come to mind. In the case of ankle injuries, there is the Lauge-Hansen system of classification, using a two word descriptor, the first word being the position of the foot at the time of injury, while the second word describes the direction of the deforming force causing the injury (Thomsen
