The main causes of heel swelling are as follows: 1. Heel bursitis, there is a bursa right below the heel that can play a cushioning role. If you walk too much or wear hard-soled shoes, as well as often step on the gravel road, it may cause inflammation under the heel bursa. Inflammation will increase the exudate, local fluid accumulation can cause swelling and pain. 2, spondyloarthropathies, peripheral spondyloarthropathies often cause Achilles tendonitis, that is, the heel area will be swollen, high, after a long time to become very high, very large, usually can not be disappeared, due to spondyloarthropathies caused by the inflammation of Achilles tendon end, the long mechanized, calcified caused by the 3, traumatic injuries, trauma, traumatic injury occurs after the absence of early cold compresses, the exudate increases, the accumulation of the bursa on the heel, the bursa can be inflamed, the bursa can play the role of cushion. If the cold compress is not applied at an early stage after the trauma, the oozing will increase and accumulate on the inner and outer side of the ankle joint, which will also cause swelling and pain of the heel.