Degenerative disc disease is one of the most common causes of low back pain, and also one of the most misunderstood. Disc degeneration is a natural part of aging and over time all people will exhibit changes in their discs consistent with a greater or lesser degree of degeneration. However, not all people will develop symptoms. In fact, degenerative disc disease is quite variable in its nature and severity.
This shows how a tight psoas effects the upper body by pulling the shoulders, head and neck forward. Look at the whole body with a soft focus and even though the symptoms are screaming there is usually something more going on in other parts of the body contributing to your pain.