If you read one page on this site, read this one

What chronic pain is

Pain is classified as chronic when it persists beyond three months, or beyond the expected healing time for an injury. That definition is administrative. The more useful one is mechanistic: chronic pain is what happens when a protective system stays switched on after the situation it was protecting you from has changed.

Pain is produced by the nervous system, always — including the pain of a fresh fracture. That is not a claim that pain is imaginary. It is a claim about where pain is generated, and it matters because it explains something that otherwise looks impossible: how severe pain can exist with an unremarkable scan, and how significant tissue damage can exist with very little pain.

Three ideas do most of the explanatory work across this site. Sensitivity can change independently of damage. Context — sleep, threat, expectation, history — modulates the output. And capacity is trainable, even when structure is not.

How this site approaches the topic

We sit deliberately between two camps. One insists that persistent pain is essentially structural and that the answer is always in the tissue. The other insists it is essentially psychological and that the answer is always in the mind. Both are too tidy to be true, and both have produced a great deal of harm.

Our position is that pain is a biological output shaped by tissue, nervous system, and context simultaneously, and that the honest task is working out the relative weight of each for a particular person. That means we publish material that neither camp will fully like.

Editorial standards

• Every claim is labelled with one of four evidence levels, described below. Labels are applied per article and, where a section diverges, within the article.
• Primary sources are cited at the end of every article. We cite the paper, not the press release about the paper.
• We publish uncertainty. When a promising finding fails to replicate, we update the article and say so rather than quietly deleting it.
• No sponsored content, no advertising, and no affiliate relationships that influence editorial judgement. Our own products are labelled as ours.
• We never claim to cure anything, and we never present a mechanism as a treatment.

The four evidence categories

How to use the site

If you are newly in pain and frightened, begin with Why Your MRI Does Not Explain Your Back Pain, then read Central Sensitization, Explained Without Jargon. Together they cover most of what people wish someone had told them in the first month.

If you have been in pain for years and have read a great deal already, start with Sleep Is Not a Side Issue and Graded Exposure. They are the two areas where sustained effort most reliably changes outcomes.

If you want the papers themselves, the Research Library collects our plain-language readings with citations. The Resources page lists the tools and organisations we recommend, including ones we have no financial relationship with.

What this site is not

It is not medical advice, and it cannot assess you. If you have new or progressive weakness, numbness around the groin, loss of bladder or bowel control, unexplained weight loss, or fever alongside pain, stop reading and seek medical care today.