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Five myths about chronic pain: Why it is not all in the head

Aug. 16, 2016 ABC (Australia)

We have all experienced pain. Think of the last time you stubbed your toe, got a paper cut, or burned yourself on the oven.

It is certainly not fun, but it usually goes away quite quickly.

Imagine though, what it would be like to have pain that does not go away and is there every single day — that is chronic pain.

Myth 1: Pain is all in your head

A common misconception is that some people are only in pain because they are weak, anxious, depressed, or do not deal well with stress. This is not correct.

Every experience you have — touch, warmth, itch, pain — is created by the brain and thus is all in your head, but it does not mean they are not real.

Similarly, pain is a real experience that represents your brain being in protective mode and making an executive decision that your body is under threat.

If there are sufficient signals of danger present, then the output of pain is produced.

Things like fear, anxiety, or depression can increase pain levels and can increase the chance of persistent pain.

But often, these feelings only develop after a person already has chronic pain.

Myth 2: Medications are the only treatment that will help you

There are many ways to treat pain without getting out the pill packet.

A quirky new discovery is that pain can be reduced, just by looking at visual illusions.

Our brain combines information about our body from lots of sources, such as touch, vision, movement and sound.

Because all this information is combined together, it means that changes in information from one source, such as vision, can change information from another source, like the danger signal coming from our body to the brain.

Visual illusions are thought to work by altering the danger signal that comes to the brain.

Illusion therapies have been shown to reduce pain and swelling related to movement in people with pathological arm pain; and preliminary work shows that they also reduce joint pain for hand osteoarthritis and knee osteoarthritis.

And there many other options available for sufferers of chronic pain that do not involve medication, including:

  • Exercise supervised by a health professional;
  • Behavioural therapy, particularly therapy that focuses on reducing fear of movement in order to change behaviour;
  • Explaining pain education, which helps people understand that pain is not representative of tissue damage;
  • Mindfulness therapy, where a patient learns to acknowledge their pain, but allows it to pass by not focusing on the negative consequences of the pain.

Myth 3: More tissue damage means worse pain

Contrary to popular belief, you can experience pain without any tissue damage at all.

Conversely, you can have tissue damage and not experience pain. Just think about a time where you have had a bruise that you do not remember getting — you had tissue damage, but no pain.

It is especially important to understand that pain is not an accurate indicator of tissue damage in people with chronic pain, as often their tissue damage has already healed.

Many things can change how much pain you experience, without changing how much tissue damage there is. For example, merely expecting pain to increase can completely take away the effect of a powerful pain medication.

In people with chronic pain, the nervous system itself can become especially sensitive.

It is like a radio; if you turn up the volume, it does not mean the announcer is speaking louder, it just means that you are amplifying the sound.

Similarly, if the nervous system is sensitive, it is amplifying signals to the brain, which results in more pain — regardless of how much tissue damage there is.

We also know that things that fire together, wire together.

So if you often feel anxious when there is a twinge of pain during movement, then the areas of your brain that activate with movement, anxiety and pain all get very good at firing together.

This means that just movement or anxiety can activate this anxiety-pain-movement brain network. So you feel pain, without there actually being a danger signal from damaged tissue.

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