Pain Education

The Hidden Cost of Chronic Pain

Chronic and persistent pain are the leading cause of disability in the United States, creating an economic burden of more than $650 billion every year in medical expenses and lost productivity. That means chronic pain costs more than diabetes, cancer, and heart disease combined.

Beyond the financial impact, chronic pain affects every part of lie - mobility, work, sleep, relationships, and overall well-being.

It contributes to more annual deaths than motor vehicle accidents, yet efforts to prevent chronic pain or provide effective, evidence‑based management remain limited.

Despite how common and life‑altering chronic pain is, most people never receive clear education about what pain actually is, why it becomes persistent, or how it can be improved. Changing that is the foundation of modern pain education.

Understanding How Pain Becomes Persistent

Chronic or persistent pain is often described as pain lasting longer than 3–6 months. But time alone doesn’t explain why pain becomes long‑lasting. There’s no single biological switch that flips at the 3‑month mark. Instead, researchers have identified different pathways that can lead to persistent pain.

One influential model describes two primary types of chronic pain:

Type I: Acute pain that simply continues for a prolonged period.
Type II: Pain that undergoes a mechanistic shift — meaning the pain is no longer directly tied to the original injury, and treatments that normally help acute pain stop being effective.

This second type is especially important in modern pain science. It reflects a transition where the nervous system becomes more involved, and pain becomes less about tissue damage and more about sensitivity, protection, and learned patterns.

Mechanical Causes of Pain

Pain can arise when the body’s mechanical structures — muscles, nerves, joints, and connective tissues — are stressed, compressed, or stretched beyond their normal limits. These mechanical forces activate sensitive nerve endings and can create pain ranging from mild discomfort to severe, radiating symptoms.

1. Pressure on Nerves

Nerves can become irritated when something presses against them. This pressure may come from:

Bone or joint structures
Thickened ligaments
Tight muscles
Bulging or herniated discs

When a nerve trunk or one of its branches is compressed, pain often follows the path of that nerve. Examples include:

Arm pain from cervical nerve compression
Sciatic pain from piriformis tightness or disc pressure

Nerve pressure typically produces pain before numbness or weakness appear.

2. Tension on Sensitive Tissues

Many tissues in the body contain nerve endings that respond strongly to stretch or deformation. When these tissues are pulled too far or too fast, pain occurs.

Common causes include:

Sudden muscle strain
Overstretching
Prolonged postural stress
Tight muscles pulling on their attachments

Depending on the severity, this tension can create anything from a mild ache to sharp, intense pain.

3. Strain of Soft Tissue

Soft tissues — muscles, tendons, ligaments, fascia — can become strained when exposed to excessive internal forces. This often happens due to:

Repetitive stress
Poor posture
Sudden overload
Chronic muscular tightness

Strained tissues become inflamed and hypersensitive, contributing to persistent pain patterns.

4. Dermatomal vs. Peripheral Nerve Pain

Understanding how pain spreads helps identify the source:

Dermatomal Pain (Root Level)

When a spinal nerve root is irritated, pain follows a dermatomal pattern — a predictable strip of skin supplied by that nerve. Example: Sciatica following the L5 or S1 dermatome.

Peripheral Nerve Pain

When a peripheral nerve is irritated outside the spine, symptoms may appear:

Above the site of irritation
Along the nerve’s pathway
With or without tingling
With or without weakness

Weakness can occur even when pain is minimal, depending on which fibers are affected.

Summary

Mechanical pain occurs when nerves or soft tissues are:

Compressed
Stretched
Strained
Misaligned

These forces activate sensitive nerve endings and create pain patterns that often follow predictable anatomical pathways. Understanding these mechanisms helps identify the root cause and guides effective corrective treatment.

Where Myofascial Pain Fits In

Myofascial pain — pain arising from muscles and the connective tissues around them — plays a major role across both acute and chronic pain conditions. In the foundational work of Travell and Simons, they noted that most people will experience myofascial trigger points at some point in their lives. Modern research continues to confirm that trigger points are extremely common and appear in a wide range of pain presentations.

Because myofascial trigger points can develop from injury, stress, posture, overload, or even protective muscle guarding, they often become part of the cycle that keeps pain going. This makes them a key component in understanding why pain persists and how it can be effectively treated.

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Meet the Team

Don Francis

Lead Veterinarian

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Ashley Jones

Veterinary Technician

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Tess Brown

Veterinarian

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