Inflammation of the bursa at the rear of the heel is called Retrocalcaneal Bursitis. Repetitive pressure or friction in excess of the back on the heel causes the bursa to swell leading to heel pain and tenderness, swelling and ankle stiffness. Often linked to Achilles Tendonitis and Haglunds Deformity.   Substantial https://www.theorthopaedicandpainpractice.com/the-definitive-guide-to-diagnosing-and-treating-ankle-pain-in-singapore/