What is chronic pain and how does it work? – video explainer

For years people with conditions such as fibromyalgia or bad back pain - to name just two - have been told the pain is all in their head. With no obvious physical symptoms, nociplastic pain can be difficult to diagnose but its effects are very, very real. Research suggests that the immune system plays a role in nociplastic pain, giving people 'feel bad' symptoms including fatigue, anxiety and nausea

• Sufferers of chronic pain have long been told it's all in their head. We now know that's wrong