Chronic pain can be relevant to a Personal Independence Payment (PIP) claim if it affects specific daily-living or mobility activities, rather than simply because you have a diagnosis. The DWP considers whether you can complete activities safely, to an acceptable standard, repeatedly and within a reasonable time, including how your difficulties vary over time. Give practical examples and supporting evidence from healthcare professionals, treatment records or people who know how your condition affects you. Check the current guidance on GOV.UK, as entitlement depends on your individual circumstances and the assessment decision.