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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

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Accession:HP:0025145 term browser browse the term
Definition:Severe chills with violent shivering. A rigor is an episode of shaking or exaggerated shivering which can occur with a high fever.
Comment:A sudden attack of severe shivering accompanied by chills (a feeling of coldness) is called a rigor and may be associated with a marked rise in body temperature. Patients often describe rigors as an attack of uncontrollable shaking. Rigors are often a sign of infection, particularly bacterial infection.
Synonyms:exact_synonym: Rigours

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  Human phenotype 0
    Phenotypic abnormality 0
      Constitutional symptom 0
        Shivering 0
          Rigors 0
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