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The Human Phenotype Ontology (HPO) is downloaded weekly from The file downloaded is considered the "last stable build" available for the ontology. For more about the HPO, view their website at

Term:Chronic pain
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Accession:HP:0012532 term browser browse the term
Definition:Persistent pain, usually defined as pain that has lasted longer than 3 to 6 months.
Comment:Acute pain is provoked by a specific disease or injury, serves a useful biologic purpose, is associated with skeletal muscle spasm and sympathetic nervous system activation, and is self-limited. Chronic pain, in contrast, may be considered a disease state. It is pain that outlasts the normal time of healing.
Synonyms:exact_synonym: Long-lasting pain
 xref: MESH:D059350;   SNOMEDCT_US:82423001;   UMLS:C0150055

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Path 1
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  Human phenotype 0
    Phenotypic abnormality 0
      Constitutional symptom 0
        Pain 0
          Chronic pain 0
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