PIT Therapy and Peripheral Nerve Matrix: A Neurofunctional Breakthrough in Chronic Pain Management

⚙️ Rethinking Chronic Pain: A Neurophysiological Perspective

The traditional view that chronic pain stems solely from structural damage is no longer sufficient. Advances in neuroscience reveal that persistent dysfunction in the peripheral and central nervous systems often underlies chronic pain, even in the absence of visible injury. How that pairing works on a sensitized nervous system is described in resetting the nervous system with PIT and EMTT.

Key contributors include:

• Peripheral neuroinflammation, caused by ischemia, compression, or metabolic stress, leads to sustained release of substances like Substance P and CGRP.
• Peripheral sensitization, where nerves lower their activation threshold, resulting in exaggerated pain responses such as allodynia and hyperalgesia.
• Autonomic-sensory feedback loops, where inflammation induces local vasodilation, trophic skin changes, and prolonged sympathetic activation.

The Perineural Matrix: A Dynamic Sensory Interface

This matrix, composed of sensory nerve endings, glial cells, immune mediators, and connective tissue, is far from passive. It actively modulates pain and, when disrupted, becomes a source of pain generation on its own, regardless of tissue integrity.

🧬 What is Perineural Injection Therapy (PIT)?

Composition

PIT uses buffered 5% dextrose (D5W), a safe, isotonic, and pH-balanced solution. Unlike corticosteroids or anesthetics, D5W offers:

• Inhibition of proinflammatory neuropeptides
• Downregulation of TRPV1 channels
• Osmotic modulation of the perineural environment

This results in anti-inflammatory and pro-regenerative effects with minimal risk.

Application

• Targeting: Painful superficial nerves are identified through palpation and/or ultrasound.
• Technique: Microinjections (low volume) are delivered subcutaneously, adjacent to nerves.
• Treatment Plan: Typically 5–20 injection points per session, 1–2 times per week for 4–6 weeks. Follow-up sessions are spaced 2–4 weeks apart based on clinical progress.

Biological Action

PIT reduces abnormal nerve excitability, calms neurogenic inflammation, promotes axonal healing, and supports cortical desensitization.

📊 Clinical Outcomes

Emerging evidence and case data indicate high efficacy in various conditions:

• Post-surgical neuralgia: Over 70% of patients report a 50% or greater reduction in pain (VAS) within 4–6 sessions.
• Diabetic neuropathy: Marked improvement in burning, tingling, and numbness, with better DN4 scores.
• CRPS: Reductions in pain, edema, and autonomic symptoms.
• TMJ dysfunction: Fewer pain episodes and improved mandibular mobility after just a few treatments.

🛠️ Indications

PIT is especially effective for:

• Peripheral neuropathies (diabetic, idiopathic)
• Postoperative neural entrapments
• Complex Regional Pain Syndrome (CRPS)
• Thoracic Outlet Syndrome
• Neurogenic TMJ dysfunction
• Myofascial pain with neural involvement

🔄 Multimodal Neurofunctional Integration

PIT reaches its full potential when combined with complementary therapies:

• AIMS (Assessment of Integrated Movement System): Detects and addresses neuromotor dysfunction post-sensitization.
• LLLT (Low-Level Laser Therapy): Enhances ATP production and promotes nerve recovery.
• ESWT (Shockwave Therapy): Breaks chronic pain cycles and improves blood flow.
• TECAR and Cryotherapy: Accelerate inflammatory resolution and tissue metabolism.
• EMTT (Electromagnetic Transduction Therapy): Restores axonal communication and electrical balance.

🧾 Safety and Contraindications

Safety

• Non-pharmacological
• Minimal systemic absorption
• Well-tolerated with low complication rates
• Requires only brief post-procedure rest (1–2 hours)

Contraindications

Absolute:

• Active infections
• Severe thrombocytopenia
• Allergy to dextrose
• Uncontrolled sensory neuropathies

Relative:

• Recent chemotherapy
• Pregnancy (case-by-case approval)
• Genetic neuropathies during acute flares

📈 Expected Results

Short-Term

• Pain relief within 48–72 hours
• Decreased allodynia
• Improved temperature regulation and edema

Medium-Term

• Restored function (walking, grip, jaw motion)
• Reduced reliance on analgesics
• Enhanced quality of life

Long-Term

• Neurological stability
• Lower recurrence rates
• Return to sleep, work, and exercise routines.

✅ Final Thoughts

Perineural Injection Therapy is changing how chronic pain is treated. Rather than masking symptoms, PIT modulates the neural matrix and restores the body’s pain perception at its source.

When integrated into a neurofunctional care model, PIT empowers providers to not only manage pain, but transform patient outcomes through recovery, regulation, and long-term relief.

Frequently asked questions

Does PIT change the underlying nerve problem or only the pain signal?
The intent is to change the environment around the nerve rather than to block the signal, which is why no anaesthetic or steroid is involved. Settling neurogenic inflammation can allow an irritated nerve to behave more normally. Where a nerve is being physically compressed or damaged by an ongoing cause, that cause still has to be addressed separately.

Is anything used to numb the skin before the injections are given?
Usually not, because the needles are very fine and the solution is placed only just beneath the surface. Adding a numbing agent would also change the sensation the clinician uses to locate sensitive points. Anyone particularly anxious about needles should raise it beforehand, since pacing, positioning and the number of points treated can all be adjusted.

Why does PIT use many shallow injections instead of one deep one?
Because the target is a pathway rather than a single point. Sensitised sensory nerves run close beneath the skin over a considerable distance, and the irritation is usually spread along that route. Multiple small subcutaneous injections follow it, whereas one deep injection would treat a single spot and carry more risk of contacting structures that were never the problem.

What does it mean if pain returns a few days after a PIT session?
Early relief that fades is common and does not mean the treatment has failed. It suggests the right nerves were reached but that the irritation has not yet settled, which is why sessions are typically repeated over several weeks before the response is judged. The pattern clinicians look for is relief that lasts progressively longer between sessions.

Can PIT be used in an area that has already had steroid injections?
Previous steroid injections do not rule it out, though the clinician will want to know how many were given, where, and how recently. Repeated steroid exposure can affect the quality of skin and connective tissue locally, which may influence timing and technique. Any active infection or recent procedure in the same area also needs to be disclosed.