Inflammation of your bursa behind the heel is referred to as Retrocalcaneal Bursitis. Repetitive tension or friction more than the back with the heel brings about the bursa to swell leading to heel pain and tenderness, swelling and ankle stiffness. Usually linked to Achilles Tendonitis and Haglunds Deformity.   Significant Ankle https://www.theorthopaedicandpainpractice.com/the-definitive-guide-to-diagnosing-and-treating-ankle-pain-in-singapore/