The main causes of heel swelling are the following: 1. Heel subluxation bursitis, there is a bursa directly below the heel, which can play a padding role. If you walk too much or wear hard-soled shoes, as well as often stepping on gravel roads, it may cause inflammation of the heel bursa. 2, spondyloarthropathy, peripheral spondyloarthropathy can often cause Achilles tendonitis, that is, the heel area will be swollen, high up, after a long time become very high, very large, usually can not disappear, is due to spondyloarthropathy caused by the inflammation of the Achilles tendon end, day after day mechanization, calcification caused. 3, trauma, trauma occurred if not early cold compress If you do not apply cold compresses early after the trauma, the exudation increases and accumulates in the inner and outer side of the ankle joint, which will also cause swelling and pain in the heel.