• 15 Aug, 2026
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What Is an Epidural Steroid Injection? | Unity Pain

You Deserve Real Answers About Your Back Pain

If you have been living with shooting pain down your leg, numbness, or a deep ache in your lower back that just will not quit, you know how exhausting it can be. Simple things like walking to the mailbox or sitting through dinner can feel impossible. When other treatments have not brought enough relief, your doctor may mention an epidural steroid injection. That phrase can sound scary at first. But understanding what it is — and what to expect — can help you feel more confident about your next step.

This article will walk you through what an epidural steroid injection is, how it works, and what you might experience before, during, and after the procedure. Knowledge is a powerful tool when you are trying to take back control of your life.

What Is an Epidural Steroid Injection?

An epidural steroid injection — often called an ESI — is a procedure where medicine is delivered directly into a space in your spine called the epidural space. This space surrounds the spinal cord and the nerve roots that branch out from it. When nerves in this area become irritated or compressed, they can send pain signals all the way down into your legs or arms. That kind of pain is sometimes called radiculopathy, or more commonly, a “pinched nerve.”

The medicine used is usually a combination of a corticosteroid (an anti-inflammatory drug) and sometimes a local anesthetic. The steroid works to reduce swelling and inflammation around the irritated nerve. Less inflammation often means less pain. This is not the same kind of steroid that athletes misuse. Corticosteroids are medicines that mimic hormones your body naturally makes to control inflammation.

What Conditions Can ESIs Help With?

Epidural steroid injections are most often used for pain that travels along a nerve pathway. Common conditions that may benefit include:

• Herniated disc — when the soft center of a spinal disc pushes through its outer layer and presses on a nerve
• Spinal stenosis — narrowing of the spinal canal that squeezes nerves
• Degenerative disc disease — wear and tear on the discs between your vertebrae
• Sciatica — pain that shoots from the lower back down through the buttock and leg
• Spondylolisthesis — when one vertebra slips forward over another

It is important to understand that an ESI is not a cure. It is a tool to help manage pain, often enough to allow you to participate more fully in physical therapy or daily activities. Every person’s body responds differently, and a qualified pain specialist should evaluate whether this treatment is right for your specific situation.

What Happens During the Procedure?

Before the injection, your care team will review your medical history and may look at imaging like an MRI or X-ray. On the day of the procedure, you will likely be asked to lie on a table. The skin over the injection site is cleaned and numbed with a local anesthetic so you feel as little discomfort as possible. Most people feel some pressure but not severe pain.

The doctor uses a special type of real-time X-ray called fluoroscopy to guide the needle safely to the exact right spot in the epidural space. This imaging guidance is very important for accuracy and safety. Once the needle is in the correct position, the medication is slowly injected. The whole process usually takes only 15 to 30 minutes. You will rest briefly afterward before going home.

What Should You Expect After the Injection?

It is normal to feel some soreness at the injection site for a day or two. Some people notice a temporary increase in pain before things start to improve — this is not unusual. If a local anesthetic was included in the injection, you might feel some relief within hours, but this can wear off before the steroid starts to work. The anti-inflammatory effects of the steroid usually build over several days to a couple of weeks.

Your doctor will likely ask you to track your pain levels and activity after the procedure. This information helps guide your overall treatment plan. You may be advised to avoid strenuous activity for a short time and to watch for any unusual symptoms. Most people go back to their normal routine the following day, though this varies. Always follow the specific instructions your provider gives you.

Are There Risks Involved?

Like any medical procedure, epidural steroid injections carry some risks, though serious complications are uncommon. Possible side effects can include:

• Temporary increase in pain or soreness
• Headache
• Flushing or a brief rise in blood sugar (especially important for people with diabetes)
• Rarely, infection or bleeding at the injection site
• Very rarely, nerve damage

Because repeated steroid injections can have effects on the body over time, providers generally limit how many ESIs a person receives within a given period. Your doctor will weigh the benefits against the risks based on your individual health history. Open, honest conversations with your care team are the best way to make sure this treatment is a safe option for you.

Is an Epidural Steroid Injection Right for You?

That is a question best answered by a pain management specialist who knows your full medical history and has reviewed your imaging. ESIs work well for some people and less well for others. They are usually considered when more conservative treatments — like rest, physical therapy, or oral medications — have not provided enough relief on their own.

If you are in the Modesto area and wondering whether spine injections or other pain management options might help you, the team at Unity Pain Management is here to listen and help you explore your choices. They work with most insurance plans and offer a range of services designed to meet you where you are in your pain journey. You do not have to keep searching for answers alone.

A Hopeful Path Forward

Chronic pain can make the world feel very small. But there are real, proven tools that can help make it bigger again. An epidural steroid injection may be one piece of a broader plan that helps you get back to the life you want to live. Take things one step at a time, ask questions, and know that seeking help is a sign of strength — not weakness. Relief may be closer than you think.

References

• Manchikanti, Laxmaiah, et al. “Epidural Injections for Lumbar Radiculopathy or Sciatica.” Pain Physician. 2015.
• National Institute of Neurological Disorders and Stroke. “Back Pain Fact Sheet.” National Institutes of Health. 2023.
• Mayo Clinic Staff. “Epidural Steroid Injections: Why Are They Done?” Mayo Clinic. 2023.
• Bogduk, Nikolai. “Epidural Steroids.” Current Opinion in Anaesthesiology. 2010.
• Centers for Disease Control and Prevention. “Arthritis and Chronic Pain.” CDC. 2022.