Haglund’s syndrome involves a unpleasant swelling of the inflamed retrocalcaneal bursa (a small fluid stuffed sac Positioned behind the heel), often coupled with the degeneration with the fibers of the Achilles tendon straight at its insertion into the heel bone (insertional tendinopathy with the Achilles tendon). Persistent Achilles tendon pain https://www.theorthopaedicandpainpractice.com/what-are-spurs-on-the-foot/