Why do they have a series of three shots for epidural -back pain?

A series of three epidural steroid injections for Back pain is often recommended to provide more effective pain relief and reduce inflammation over time. The initial injection may offer immediate relief, while subsequent shots can help maintain that relief and address any recurring pain. This approach allows for a cumulative effect, potentially improving the patient's overall function and quality of life. Additionally, it provides an opportunity to evaluate the response to treatment and adjust the management plan accordingly.