# How Perineural Injection Therapy Targets the Root Cause of Neuropathic Pain

If you've been living with chronic pain - the kind that burns, tingles, aches, or shoots without warning - you've probably been told it's "just nerve pain" and handed a prescription that barely takes the edge off. But what if there was a treatment that didn't just mask the pain, but actually addressed why your nerves are misfiring in the first place?

That's exactly what **[Perineural Injection Therapy](https://www.learnneuraltherapy.com/class)** (PIT) sets out to do. And for thousands of patients who had all but given up on finding relief, it's changing everything.

**First, What Is Neuropathic Pain — Really?**

Neuropathic pain isn't just pain that happens to involve nerves. It's a fundamentally different type of pain that arises when the nervous system itself becomes damaged or dysfunctional. Unlike the sharp, short-lived pain you feel when you stub your toe, neuropathic pain tends to be persistent, unpredictable, and notoriously difficult to treat.

Common causes include diabetic neuropathy, nerve compression from herniated discs, post-surgical nerve damage, sports injuries, and conditions like fibromyalgia or complex regional pain syndrome (CRPS). But the root issue, more often than not, comes down to something called neurogenic inflammation.

**The Real Culprit: Neurogenic Inflammation**

Here's where things get interesting — and where most conventional treatments miss the mark.
Beneath the skin, your body has a vast network of small sensory nerves called cutaneous nerves. These nerves don't just transmit pain signals — they also release chemical messengers that regulate inflammation and tissue healing. When these nerves become injured or chronically irritated, they get stuck in a state of hypersensitivity. They start firing constantly, flooding the surrounding tissue with inflammatory neuropeptides like substance P and CGRP (calcitonin gene-related peptide).

The result? A self-perpetuating cycle of inflammation and pain. The nerve is inflamed, which makes it more sensitive, which causes it to release more inflammatory chemicals, which causes more inflammation — and so the cycle continues.
This is neurogenic inflammation. And it's the root cause of much of the chronic pain that conventional treatments fail to resolve.

**How PIT Breaks the Cycle**

Perineural Injection Therapy, developed by New Zealand physician Dr. John Lyftogt, is built on a simple but profound insight: if you can reduce the inflammation around the nerve itself, you can interrupt this pain cycle at the source.

PIT involves the injection of a very low concentration of dextrose (a naturally occurring sugar solution) just beneath the skin, targeting the specific nerves that are causing pain. This is known as a subcutaneous or perineural injection — delivered around the nerve, not into it.

So how does sugar stop nerve pain? The mechanism is more nuanced than it sounds.

Dextrose works by blocking the TRPV1 receptor — a key receptor on sensory nerve endings that, when activated, triggers the release of those inflammatory neuropeptides. By temporarily blocking this receptor, the dextrose solution allows the nerve to calm down, the inflammation to subside, and the tissue to begin healing.

Unlike corticosteroid injections, which suppress inflammation broadly and can have systemic side effects, PIT works locally and specifically. It doesn't suppress your immune system. It doesn't damage tissue over time. It simply gives your overactivated nerves permission to stand down.

**What Makes PIT Different from Other Injection Therapies?**

If you've explored other injection-based treatments — like prolotherapy, platelet-rich plasma (PRP), or trigger point injections — you may be wondering how PIT fits into the picture.

The key difference is target and depth. Most other injectable therapies work deeper in the body — at the level of ligaments, tendons, joints, or muscle. PIT specifically targets the superficial sensory nerves just beneath the skin. This makes it uniquely suited to treating the neurogenic component of pain, which often goes unaddressed even when other structures are treated.

In many cases, PIT is used alongside other regenerative therapies. A skilled practitioner might treat the nerve pain with PIT while also addressing underlying structural issues with prolotherapy or PRP. This integrated approach is something practitioners trained through **Learn Neural Therapy** are well-equipped to offer — combining a deep understanding of the nervous system with hands-on injection skills to create truly comprehensive pain management plans.

**What Conditions Can PIT Help?**

Because neurogenic inflammation plays a role in so many chronic pain conditions, PIT has a surprisingly wide range of applications. Patients have found relief from:

**Chronic neck and back pain —** especially when conventional treatments have plateaued
**Headaches and migraines —** often triggered by sensitized nerves in the scalp and neck
**Joint pain —** including knee, shoulder, and hip pain where nerve sensitization is a contributing factor
**Post-surgical pain —** nerve irritation following surgery is common and often overlooked
**Sports injuries —** nerve damage from repetitive strain or acute trauma
**Neuropathy —** particularly in the feet and hands from diabetic or idiopathic causes
**Scar-related pain —** scars can trap and irritate nerves, and PIT can address this directly
**Fibromyalgia and widespread pain syndromes —** where nervous system sensitization is central to the condition

This breadth isn't surprising when you understand the mechanism. If the problem is a hypersensitized nerve, and PIT calms that nerve, the underlying diagnosis matters less than the neurological reality of what's happening.

**What Does Treatment Actually Look Like?**

One of the things patients often appreciate most about PIT is how gentle it is. The injections are superficial — just beneath the skin — and use very fine needles. Most patients describe the sensation as a mild sting that passes quickly.

A typical session involves mapping the painful areas and identifying the specific nerves involved. The practitioner then delivers a series of small injections along the nerve pathways, following the anatomy of the cutaneous nerve network. Sessions usually last between 20 and 45 minutes, depending on how many areas are being treated.

Many patients notice some improvement immediately after their first session, though lasting results typically build over a course of treatments. The number of sessions needed varies — some people find significant relief after three to four visits, while others with more chronic or widespread pain may need more.

Recovery is minimal. Most patients return to normal activities the same day. There's no downtime, no general anaesthesia, and no lengthy rehabilitation.

**The Importance of Proper Training**

As interest in PIT grows, so does the importance of finding a practitioner who truly understands the science behind it. This isn't simply about learning to give injections — it requires a thorough understanding of cutaneous nerve anatomy, pain neuroscience, and the clinical judgment to map and treat complex pain presentations accurately.

This is why professional education in this space matters. Learn Neural Therapy has become a respected resource for healthcare practitioners looking to deepen their expertise in neural and perineural injection techniques. Through structured, evidence-informed training, clinicians learn not just the how of PIT, but the why — building the kind of foundational knowledge that leads to consistently better patient outcomes.

For patients, this means that when you seek out a PIT provider, it's worth asking about their training background. A practitioner who has invested in quality education is one who will approach your care with both skill and understanding.

A New Way of Thinking About Pain

Perhaps the most important shift that PIT represents isn't just clinical — it's conceptual. For too long, chronic pain has been treated as a symptom to be suppressed rather than a problem to be solved. The rise of neurogenic inflammation as a recognized driver of pain, and the emergence of targeted therapies like PIT, represents a genuine evolution in how we understand and treat suffering.

If you've been told there's nothing more that can be done, or if medication and **[Neural therapy](https://www.learnneuraltherapy.com/blog/understanding-neural-therapy-top-6-benefits)** have only taken you so far, Perineural Injection Therapy may be the missing piece you've been looking for. Not because it's a miracle cure — but because it finally addresses the root cause that everything else has been working around.

Pain that starts in the nerve deserves a treatment that starts there too.