Spinal injections are used in two ways. First, they can be performed to diagnose the source of back, leg, neck, or arm pain (diagnostic). Second, spinal injections can be used as a treatment to relieve pain (therapeutic).
Most spinal injections are performed as one part of a more comprehensive treatment program. Simultaneous treatment nearly always includes an exercise program to improve or maintain spinal mobility (stretching exercises) and stability (strengthening exercises).
The theory is that the medications will reduce the inflammation the affected area and the patients can get pain relief.
However, if the injection does not work, it is likely that majority of your symptoms are stemming from mechanical or structural problems at the affected area and the surgery might be indicated.