60 Seconds To Understand Pain

Part I: The Biology of Protection

Persistent pain can be confusing because it may not match what scans show. It may linger longer than expected, and it may return unexpectedly or intermittently despite rest.

To understand why, we need to clarify what pain actually represents.

Part II: Pain Is an Alarm, Not a Damage Meter 🧠

When tissue is stressed or injured, signals travel through the nervous system toward the brain. The brain interprets those signals alongside context, including factors such as fatigue, stress, previous injury, expectation and environment.

If it perceives threat, it produces pain.

In acute injury, this is protective and appropriate; it limits movement and supports recovery.

In persistent (chronic) pain, however, the system can become overprotective.

Part III: Understanding Pain and Damage Do Not Always Correlate

Imaging frequently reveals disc degeneration, tendon thickening or cartilage changes in people with no symptoms at all. Equally, individuals may experience significant pain despite minimal structural findings. This does not mean the pain is psychological - it simply reflects sensitivity within the nervous system. Over time, particularly after repeated irritation or overload, the threshold for protection lowers and movements that were once tolerated begin to trigger discomfort. Essentially, the alarm becomes easier to activate.

Part IV: Scans Do Not Always Explain Symptoms 📊

Large imaging studies have demonstrated that structural “abnormalities” are common in people with no pain at all. Research shows that around 60% of 50-year-olds have disc bulges on MRI despite being completely asymptomatic, and disc degeneration is present in nearly 80% of that same age group without necessarily causing pain.

Structural change does not automatically equal symptoms. Conversely, significant pain can exist with minimal visible tissue damage. This reflects sensitivity within the nervous system - not imagination.

Part V: Sensitivity Is Adaptive — Until It Isn’t

In the short term, increased sensitivity is helpful. It prevents further irritation.

When it persists beyond tissue healing timelines, it becomes limiting. This is why the goal of rehabilitation is not simply to quiet pain, it is to recalibrate the protective system.

This requires progressive, staged exposure to load - applied precisely and increased systematically. Avoidance alone does not restore capacity.

📍 Why This Matters in Clinical Practice

At Fit2Go, our approach to treating pain in Nottingham is grounded in this understanding. Whether managing chronic tendinopathy and persistent lower limb pain, or post-operative rehabilitation and chronic back pain, our assessment extends beyond the painful structure.

We evaluate load tolerance and strength capacity across the entire system. Treatment is designed to reduce threat sensitivity while restoring measurable physical capacity.

This is because when protection is recalibrated appropriately, movement becomes possible again - and confidence returns with it.

This article forms Part I of our 60 Seconds clinical insight series.