Nice SR of Sever´s disease management with physiotherapy:

James, A. M., Williams, C. M., & Haines, T. P. (2013). Effectiveness of interventions in reducing pain and maintaining physical activity in children and adolescents with calcaneal apophysitis (Sever’s disease): a systematic review. Journal of foot and ankle research, 6(1), 1.

General info relevant for PT yn Physiopedia collected by students from Vrije Universiteit Brussel:

http://www.physio-pedia.com/Sever’s_disease