How often cortisone injections are given varies based on the reason for the injection. This is determined on a case-by-case basis by the health care practitioner. If a single cortisone injection is curative, then further injections are unnecessary. Sometimes, a series of injections might be necessary; for example, cortisone injections for a trigger finger may be given every three weeks, to a maximum of three times in one affected finger. In other instances, such as knee osteoarthritis, a second cortisone injection may be given approximately three months after the first injection, but the injections are not generally continued on a regular basis.
Radiculopathy occurs when something irritates a spinal nerve—say a “slipped disc” causing a pinched nerve. This is also called sciatica . There are resident stem and other cells in the local tissues everywhere in our body. Many live around blood vessels. These are obviously also present in the disc and nerves in the epidural space and they usually play an important role in suppressing inflammation and repairing damage. We know, based on a copious in vitro (lab) data, that the high-dose steroids used in epidural injections can kill these cells. So the progression of the series of epidural steroid injections looks a little something like this:
For many people, back pain goes away on its own or with nonsurgical treatments. Epidural steroid injections shouldn't typically be used as a first-line therapy for back pain relief, but that doesn't mean they can't play a role in treating pain. But injections won't cure the underlying cause of back pain, and they provide only temporary relief. Unfortunately, in many cases, chronic back pain can't be cured, but must instead be managed, like other chronic conditionsand patients must have realistic expectations of what epidurals can do.