Subtalar arthritis refers to arthritis occurring at the subtalar joint of the foot, where the talus (ankle bone) meets the calcaneus (heel bone). Arthritis is an umbrella term that can refer to many conditions of which the most common are osteoarthritis and rheumatoid arthritis. In the case of the subtalar joint, the type of arthritis most commonly experienced (osteoarthritis) is caused by a degeneration of the cartilage that is supposed to prevent the two bones from rubbing directly against each other. The result is pain, stiffness and tenderness of the joint. An ankle orthopedic brace can be used to reduce the relative movement of the talus and calcaneus bones and so provide some relief from the discomfort of the condition. In choosing a brace for this purpose, care should be taken to seek and follow the advice of a doctor to ensure the choice is suited to the patient’s activity level and other circumstances.