St. Anthony's fire (also known historically as Ignis Sacer and Holy Fire) may refer to:

  • Ergotism, the effect of long-term ergot poisoning, traditionally due to the ingestion of alkaloids
  • Erysipelas, an acute infection, typically with a skin rash
  • St Anthony's Fire (novel), a 1994 Doctor Who novel by Mark Gatiss
  • Shingles, a painful viral disease, also called herpes zoster

See also

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