Inflammation on the bursa guiding the heel is referred to as Retrocalcaneal Bursitis. Repetitive strain or friction more than the again from the heel results in the bursa to swell causing heel pain and tenderness, swelling and ankle stiffness. Generally affiliated with Achilles Tendonitis and Haglunds Deformity.   Plantar fasciitis is https://www.theorthopaedicandpainpractice.com/the-definitive-guide-to-diagnosing-and-treating-ankle-pain-in-singapore/