General injuries and conditions include: frozen shoulder, although this is fairly uncommon and often misdiagnosed. More commonly the shoulder is affected by non-traumatic conditions such as impingement or classically movement dysfunctions. The general health of an individual must be considered, with shoulders the term co-morbidities can be used to explain how conditions are affected by the health of the person generally. Common factor are diabetes and high cholesterol.
Posture of the neck and shoulders may also influence symptoms, the shoulder is effectively a floating structure only support by the surrounding soft tissue, not bone like a hip joint. It is important that the strength of the posterior or rear of the shoulder is equal if not greater than that of the front to ensure that the joint surfaces move smoothly.