The Three Types of PainNociceptive, neuropathic, neuroplastic – and why mixed pain changes the picture

People with chronic pain are often handed a false choice. Either the pain is ‘real’ – something a scan can show – or it is ‘in your head.’ Pain science doesn’t differentiate between ‘real’ and ‘false’ pain; instead it articulates three mechanisms, and persistent pain often involves more than one of them at once. Knowing the three, and how they combine, influences how we approach treatment.

Nociceptive pain

The technical term for what I call ‘standard pain’ is nociceptive pain. It occurs within usual expectations. For instance, when I am cutting vegetables, the knife slips, and I cut my finger. Tissue is damaged; nerve endings signal the damage; the body’s protective systems respond to heal what was harmed. The pain makes me guard the finger while repair happens. And once the tissue heals, the pain goes away and does not come back. Standard pain is typically local, proportionate to the injury, and time-limited by healing. It also includes functional inflammatory responses like redness and swelling that occur during the process of tissue healing.

Neuropathic pain

Neuropathic pain (or nerve pain) arises from the nerves themselves – formally, a lesion or disease of the nervous system. A severed or compressed nerve. An amputation. Diabetic nerve damage, or the aftermath of shingles. Here the signature is the nerve’s own territory: numbness near the damage, sometimes hypersensitivity or allodynia close by, where the injured nerve’s function has changed. And the distribution follows a known map or dermatome where the pain follows the nerve’s innervation. When pain corresponds with known physiological patterns, a neuropathic component is likely.

Neuroplastic pain

Neuroplastic pain – what the International Association for the Study of Pain calls nociplastic pain – is the third mechanism, and its signature is that it exceeds known physiological expectations for recovery. Neuroplastic pain is more generalized: it spreads, it moves, it shows up at multiple sites. It extends beyond any expected pattern. Hypersensitivity and allodynia appear across broad regions rather than near a single injured nerve. Here we find a brain that has learned to amplify danger signals.

One distinction is worth noticing carefully, because both nerve pain and neuroplastic pain can involve hypersensitivity. The difference is the map. Neuropathic hypersensitivity clusters in the injured nerve’s territory. Neuroplastic hypersensitivity ranges beyond any single nerve’s map – moving, spreading, multiplying. Distribution is a differentiator: the more general and widespread the distribution, the greater the likelihood of a neuroplastic component.

All pain is made in the brain

Here is the fact that reorganizes the whole picture: all pain, of every type, is generated by the brain. Even standard pain. When I cut my finger, the nerve endings do not send pain to the brain – they send a damage signal. The brain’s threat-detection system receives it, evaluates it, and produces pain as its protective response. No brain perception, no pain. Which is why often people can function in emergencies with an injury without noticing it: the signal is gated out until the crisis passes. The brain is not a passive receiver of pain; it is the organ that weighs the evidence for danger and decides how loudly to sound the alarm.

This is not a claim that pain is imaginary. Just the opposite: it is how pain occurs. And it explains something important – if the brain produces all pain, then the brain’s sensitivity settings are part of each type of pain, nociceptive, neuropathic and neuroplastic alike.

Mixed pain – and the upside

Which brings us to the most clinically important part: these three mechanisms are not mutually exclusive – and in persistent pain, combinations of the three are common. A person can have a genuine neuropathic injury and a neuroplastic component riding on top of it. The same is true of nociceptive conditions: a real arthritic knee, with a sensitized alarm system turning its volume up.

Arthritis is the clearest example. The tissue everyone points to on the scan – the thinning cartilage, the narrowed joint space, the ‘bone on bone’ – has no nerve endings. Cartilage is aneural: it cannot hurt. Where an arthritic joint produces standard pain, the signal comes from its innervated neighbours – the bone beneath the cartilage, the synovial lining, the capsule (O’Neill & Felson, 2018). The finding on the image and the source of the pain are not the same thing, even within the joint itself.

That may help explain a well-documented puzzle: X-ray severity and pain track each other poorly. Many people with advanced radiographic arthritis have little or no pain, and many with very painful knees have unremarkable films (Bedson & Croft, 2008). When researchers used sensory testing to ask why, the answer pointed away from the joint. People with severe pain but mild arthritis showed measurably more sensitized nervous systems than people with severe arthritis but little pain (Finan et al., 2013). The gap between the scan and the suffering was, in large part, a nervous-system gap.

And then there is the strongest evidence of all: what happens when the joint is taken out of the equation. Roughly one in five people who undergo total knee replacement report persistent pain long after surgery (Beswick et al., 2012) – the arthritic structure removed, replaced with hardware, and the pain carrying on without it. For that substantial minority, whatever was maintaining the pain was never only the joint.

And here is the upside. The work we do on neuroplastic pain – the tools and techniques that calm the nervous system and retrain the brain to stand down from generating danger signals – helps regardless of what else is present. Turning down amplification does not require denying the structural contribution. It simply treats the treatable share. For someone with mixed pain, that share is often much larger than they have been led to believe.

Often it is genuinely unclear how much of a given pain is neuropathic and how much is neuroplastic. That is not a dead end – it is an assessment question, and there are ways of gathering evidence about your own case, including the provocative testing I describe in the Insights article “What If My Chronic Pain Is Structural?” The question is never which category you fall into. It is how much of each mechanism is contributing, and what can be done about the share that the brain controls.