[Verse 1] IASP drew the lines, let's parse 'em clean Nociception's just the signal, not the feeling in between Neurons firing, transduction up the peripheral lane But pain itself is the experience, emotional and plain Allodynia hits when a feather feels like flame Non-painful stimulus twisted in the brain's frame Hyperalgesia cranks the volume way past ten Hyperpathia's the echo that keeps burning after then Dysesthesia — abnormal, spontaneous, unpleasant sensation These ain't synonyms, each term's its own foundation [Chorus] Nociceptive, neuropathic, nociplastic — classify Acute to chronic, three months is the dividing line Cancer pain, non-cancer, breakthrough on the side Primary or secondary, ICD-eleven's guide Somatic sharp, visceral dull and hard to locate Mixed pain's the puzzle when mechanisms conflate [Verse 2] Somatic pain got you pointing right at the spot Localized, sharp, proportionate — you feel exactly what you got Visceral's elusive, cramping deep inside the gut Autonomic riding shotgun — nausea, sweating, the whole cut Referred pain's the ventriloquist, throwing voice across the map Cardiac ischemia screaming through the left arm's trap The convergence theory explains that neural sleight of hand Visceral afferents sharing real estate they never planned Neuropathic pain — lesion in the somatosensory road Central or peripheral, the system's in a broken mode [Chorus] Nociceptive, neuropathic, nociplastic — classify Acute to chronic, three months is the dividing line Cancer pain, non-cancer, breakthrough on the side Primary or secondary, ICD-eleven's guide Somatic sharp, visceral dull and hard to locate Mixed pain's the puzzle when mechanisms conflate [Verse 3] Nociplastic — altered nociception with no tissue wreck No nerve lesion proving it, but sensitization's checked Central amplification running wild, gain turned up too loud Fibromyalgia, widespread chronic pain — nociplastic crowd Now temporal framing — acute's the fresh alarm Subacute sitting six to twelve weeks working toward the calm Chronic crosses ninety days, the three-month Rubicon ICD-eleven splits it — primary stands alone Secondary serves another pathology's throne Six subtypes: cancer, post-surgical, musculoskeletal, visceral — known [Bridge] Breakthrough pain is episodic, spikes above the baseline tide Incident pain has a trigger — movement, pressure, the outside End-of-dose is pharmacokinetic, medication's ebbing side Cancer pain weaves nociceptive, neuropathic nationwide Non-cancer chronic is its own labyrinthine maze Mixed pain demands we hold two mechanisms in our gaze Here's a word for the lexicon — algogenic — meaning pain-producing Every stimulus on this map is algogenic or seducing
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