Epiphysitis of the Calcaneus (Sever Disease) By Kendrick Alan Whitney, DPM, Temple University School of Podiatric Medicine Reviewed / Revised Oct 2021 | Modified Sep 2022 View Patient Education Treatment Topic Resources How to Examine the Foot How To Examine the Ankle Epiphysitis of the calcaneus is painful disruption between the calcaneal apophysis and the body of the heel that occurs before calcaneal ossification is complete.