Subtalar Joint Arthritis – forming Element of the ankle joint; this affliction may end up from prior ankle sprains, trauma, being overweight or previous surgical procedures. Overstretching of one of many ankle ligaments causing it to tear. Brings about ankle pain and instability. 85% of ankle accidents are ligament sprains.   https://www.theorthopaedicandpainpractice.com/the-definitive-guide-to-diagnosing-and-treating-ankle-pain-in-singapore/