Why Injections Don’t Always Fix the Root Cause of Disc Pain

For many people suffering from chronic back pain, sciatica, or disc injuries, steroid injections are often one of the first treatment options recommended. These injections are commonly used to reduce inflammation around irritated spinal nerves, and for some patients they can provide temporary relief.

However, many individuals who receive injections eventually notice a pattern: the pain improves for a while, but then it returns.

This experience can be frustrating and confusing. If the injection helped initially, why didn’t it solve the problem permanently?

To understand this, it’s important to look at what spinal injections are designed to do — and what they are not designed to do. While injections may reduce inflammation and calm irritated nerves, they often do not address the mechanical causes of disc-related pain.

Understanding this difference can help patients make more informed decisions about treatment options for chronic back pain and sciatica.

Understanding the Role of Spinal Discs

The spine is made up of a series of bones called vertebrae stacked on top of each other. Between each vertebra sits a cushion known as an intervertebral disc.

These discs perform several important functions in the spine:

• Absorbing shock during movement
• Allowing the spine to bend and twist
• Maintaining proper spacing between vertebrae
• Protecting nearby spinal nerves

Each disc contains a soft gel-like center surrounded by a tougher outer layer.

When discs are healthy, they help distribute pressure evenly throughout the spine.

However, over time discs may become damaged due to factors such as:

• Aging
• Repetitive spinal stress
• Prolonged sitting
• Poor posture
• Injury or trauma

As discs weaken, they may begin to bulge or herniate, which can place pressure on nearby spinal nerves.

To better understand the difference between these conditions, read:

Bulging Disc vs Herniated Disc: What’s Actually Causing Your Pain?

How Disc Problems Cause Nerve Pain

Many cases of chronic back pain occur when damaged discs begin to affect nearby nerves.

When a disc bulges or herniates, it may reduce the space available for spinal nerve roots.

If these nerve roots become irritated, symptoms may develop such as:

• Lower back pain
• Pain traveling down the leg
• Tingling or numbness in the foot
• Muscle weakness
• Sciatic nerve pain

These symptoms are commonly referred to as sciatica.

If you experience recurring nerve pain, you may find this article helpful:

Why Sciatica Keeps Coming Back (Even After Injections or Physical Therapy)

What Steroid Injections Are Designed to Do

Steroid injections are commonly used to treat inflammation around irritated spinal nerves.

These injections typically contain:

• A corticosteroid medication that reduces inflammation
• A local anesthetic that temporarily numbs the area

When injected near an irritated nerve root, the medication may help calm inflammation and reduce pain.

For some patients, this can provide significant short-term relief.

However, it’s important to understand that injections are primarily designed to reduce inflammation, not necessarily correct structural problems within the spine.

Why Inflammation Is Only Part of the Problem

Inflammation is often a response to irritation within the spine.

For example, when a spinal disc bulges or herniates, it may place pressure on nearby nerve roots.

This pressure can trigger inflammation around the nerve.

The inflammation contributes to symptoms such as:

• Pain
• Burning sensations
• Tingling
• Numbness

Steroid injections may help reduce this inflammatory response.

But if the underlying disc pressure remains, the nerve may eventually become irritated again.

Schedule a Spinal Evaluation

If you have received injections for back pain or sciatica but your symptoms keep returning, a spinal evaluation may help identify the underlying cause of your pain.

Schedule an evaluation to learn whether disc pressure or nerve irritation may be contributing to your symptoms and what treatment options may be appropriate.

Why Disc Pressure Often Remains After Injections

One of the key challenges with disc-related back pain is that structural changes within the spine may continue even after inflammation decreases.

For example, if a disc has bulged outward, the bulge may still remain after the injection.

This means the disc may continue to place pressure on nearby nerves, even though the inflammation has temporarily improved.

As the medication gradually wears off, symptoms may return.

Why Some Patients Require Multiple Injections

Because injections do not necessarily correct the structural cause of nerve irritation, some patients require repeated injections over time.

These injections may be spaced several months apart depending on the patient’s condition.

While repeat injections may help manage symptoms temporarily, they may not always provide long-term resolution if the underlying disc problem persists.

Why Sitting Often Makes Disc Pain Worse

Many individuals notice that their symptoms worsen when sitting.

This occurs because sitting increases pressure within spinal discs.

When disc pressure increases, it can aggravate existing disc injuries and increase nerve irritation.

Over time, prolonged sitting may contribute to disc degeneration.

If sitting worsens your symptoms, you may find this article helpful:

Why Sitting Is Quietly Destroying Your Spinal Discs

Why MRI Results Don’t Always Explain Pain

MRI scans are often used to evaluate spinal conditions.

However, imaging results do not always perfectly match symptoms.

Some individuals have disc abnormalities on MRI but experience little pain. Others may experience severe symptoms even when imaging appears relatively mild.

This occurs because MRI scans show the structure of the spine but cannot always capture dynamic changes in disc pressure or nerve irritation.

You can learn more about this concept here:

Why Your MRI Says “Normal” But You Still Have Back Pain

The Role of Spinal Decompression Therapy

Because disc pressure plays a major role in many spinal conditions, some conservative treatments focus on reducing pressure inside the spinal discs.

One such therapy is non-surgical spinal decompression.

Spinal decompression therapy uses controlled traction to gently stretch the spine.

In some cases, this process may help:

• Reduce pressure within spinal discs
• Improve space around spinal nerves
• Encourage fluid movement within discs
• Support spinal healing processes

You can learn more about how decompression therapy works here:

How Spinal Decompression Works (A Mechanical Explanation)

What a Spinal Decompression Session Looks Like

Many patients are curious about what decompression therapy involves.

During treatment:

• The patient lies comfortably on a specialized decompression table
• A harness stabilizes the hips or torso
• Gentle traction cycles stretch and relax the spine

Most sessions last approximately 10–20 minutes.

You can learn more about the treatment experience here:

What Happens During a Spinal Decompression Session

When Surgery May Be Necessary

Although conservative treatments can help many individuals, surgery may sometimes be necessary.

Situations where surgery may be recommended include:

• Progressive nerve damage
• Severe spinal instability
• Loss of bowel or bladder control
• Advanced disc herniation

You can learn more about this topic here:

When Is Back Surgery Actually Necessary?

Understanding the Different Causes of Sciatica

Sciatic nerve pain can originate from several different spinal conditions.

Common causes include:

• Disc compression
• Spinal stenosis
• Piriformis muscle irritation
• Degenerative disc disease

Because the underlying cause varies, treatment approaches should be tailored accordingly.

Learn more here:

The 3 Types of Sciatica (And Why Treatment Must Match the Cause)

Learn More About Non-Surgical Spinal Decompression

If recurring back pain or sciatica continues despite injections, understanding the mechanical causes of spinal pain may help guide your treatment decisions.

Explore our complete guide to Non-Surgical Spinal Decompression for Chronic Back Pain and Sciatica to learn more about how this therapy works and whether it may be appropriate for your condition.