Why does pain outlast the injury?

Your scan came back clear, but your back still hurts.

The pain is real. After months, it has simply become a different problem from the injury that started it.

Treating the two the same way is one of the most common reasons people spend years getting nowhere.

Here is what changes when pain settles in, and what helps it let go.

In this post:

1. Why pain can outlast an injury
2. How Chinese medicine describes it
3. How acupuncture can treat it

Why pain can outlast an injury

Pain starts out as an alarm that protects you. When it keeps sounding for months, the alarm itself can change.

#1: Fresh pain does a useful job

• When tissue is damaged, nerve endings report it, and the pain makes you rest the injured part while it mends.
• This kind of pain fades as you heal, so a strain settles within weeks and a broken bone knits within a couple of months.

#2: Months of pain retune the nervous system

• When pain signals arrive over and over, the spinal cord and brain get better at passing them on, like a path that gets easier to walk the more it is used.
• Researchers call this central sensitisation. In plain terms, the alarm has been turned up too high.

#3: The alarm starts going off on its own

• Signals that were once too faint to notice now get through, so a waistband or a light touch can register as pain.
• The pain can linger after whatever set it off has stopped, and spread beyond where it started.
• None of this needs any new damage to the tissue.

In long-standing pain, the pain has become the condition itself.

How Chinese medicine describes it

Chinese medicine never had the language of sensitised nerves, but it has always separated new pain from pain that has settled in.

The classical line runs 不通则痛，通则不痛: where there is no free flow, there is pain, and where there is free flow, there is none.

Long-standing pain is expected to show up in sleep, digestion and mood too, because a body that has guarded itself for years isn’t doing so in only one place. A modern pain clinic would describe much the same picture.

How acupuncture can treat it

If long-standing pain is an alarm turned up too high, treatment has to work on the alarm, not just the spot that hurts.

#1: It helps turn the alarm down

• A needle prompts the body to release its own painkillers, which quieten the nerves carrying pain. Our last article explains how that works.
• Repeated over a course of treatment, that steady, gentle input gives an oversensitive nervous system a chance to settle.

#2: It treats the whole body, not just the sore spot

• Points are often chosen well away from where it hurts, because long-standing pain is no longer confined to one place.
• Your plan also looks at sleep, digestion and stress, since a tired, tense nervous system is a more sensitive one.

#3: It works best alongside gentle movement

• Rest helps a fresh sprain, but long-standing pain rarely improves by keeping still.
• The nervous system recalibrates through steady, repeated input, so movement that stays within what you can manage, and slowly builds, supports what happens on the table.

References

• Woolf CJ. Central sensitization: implications for the diagnosis and treatment of pain. Pain 2011;152(3 Suppl):S2–S15.

This article is general information, not medical advice, and results from treatment vary from person to person. Talk to your doctor or a licensed practitioner about your own situation.