When this comes about, instant surgery to relieve the strain is needed. If remaining untreated, compartment syndrome can result in lasting tissue damage and loss of purpose. Problems such as nerve damage or malunion (wherever the bone heals in an incorrect situation) can also cause prolonged-expression troubles. Qualified Reference article https://www.theorthopaedicandpainpractice.com/what-is-a-proximal-humeral-fracture/