Why Pain Persists After Tissues Have Healed

A sprained ankle heals in weeks. A broken bone heals in a few months. Yet many people have pain that lasts long after any injury should have healed, sometimes with no clear injury at all. This is called persistent or chronic pain, usually defined as pain lasting more than three months.

It is real pain, not imagined. But it works differently from fresh injury pain.

Pain is an alarm system

Pain is produced by your brain and nervous system to protect you. When tissue is damaged, the nervous system sends danger signals and the brain decides how much protection you need. Pain is the result.

In acute injury, the alarm is useful. It makes you rest a sprained ankle while it heals.

When the alarm gets too sensitive

With persistent pain, the alarm system itself can become more sensitive. Nerves fire more easily, and the brain becomes better at producing pain. Think of a car alarm that goes off when a leaf lands on the bonnet.

This is called sensitisation. It explains why:

• Pain can spread to a larger area than the original injury
• Light touch or small movements can hurt
• Pain can flare with stress, poor sleep or worry, not just activity
• Scans may show little or nothing to explain the pain level

What keeps the alarm turned up

• Poor sleep
• Stress, low mood and anxiety
• Fear of movement and avoiding activity
• Long periods of inactivity and deconditioning
• Worrying explanations, such as being told your spine is "crumbling" or "degenerated"

What helps turn it down

• Understanding pain. Learning how pain works has been shown to reduce pain and fear for many people.
• Graded activity. Building up activity in small, planned steps, regardless of day-to-day pain, retrains the system.
• Exercise. Regular movement has pain-relieving effects on the nervous system, not just the muscles.
• Sleep and stress management. These are part of pain treatment, not extras.
• Pacing. Avoiding the cycle of overdoing it on good days and crashing afterwards.

Hurt does not always mean harm

This is the single most important idea. With persistent pain, a flare doesn't usually mean new damage. It means the system is sensitive. That makes it safer to keep moving and slowly build up, with guidance.

How a physiotherapist helps

We look at the whole picture: your body, your activity levels, your sleep and stress, and your beliefs about pain. Then we build a plan to gradually increase what you can do. The goal is not only less pain, but getting your life back.