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Last reviewed: 16 Mar 2025
Last updated: 22 Aug 2024

Summary

Definition

History and exam

Key diagnostic factors

  • severe diffuse or localised pain in an extremity
  • fever
  • localised swelling or erythema
  • hypotension
  • diffuse, scarlatina-like erythematous rash

Other diagnostic factors

  • acute mental status changes
  • influenza-like symptoms
  • muscular tenderness and weakness
  • gastrointestinal symptoms
  • features of myocarditis
  • endophthalmitis
  • hypothermia

Risk factors

  • diabetes mellitus
  • alcohol-use disorder
  • minor trauma and injuries with bruising, haematoma formation, or muscle strain
  • surgical procedures (e.g., vaginal delivery, breast reconstruction, caesarean section, hysterectomy, liposuction, bunionectomy)
  • prolonged use (>6 hours) of single tampon
  • using highly absorbent tampons
  • non-steroidal anti-inflammatory drug (NSAID) use
  • using contraceptive sponges, diaphragms, and IUDs
  • untreated strep throat

Diagnostic investigations

1st investigations to order

  • microscopy and culture (blood, wound, fluid, tissue)
  • FBC
  • coagulation profile
  • serum urea and creatinine
  • urinalysis
  • LFTs
  • creatine kinase (CK)
  • serum calcium
  • serum sodium
  • serum phosphorus
  • serum albumin
  • serum lactic acid

Investigations to consider

  • Staphylococcus aureus antibody testing
  • chest x-ray

Treatment algorithm

Contributors

Authors

Brit Jeffrey Long, MD

​Attending Physician

Associate Professor of Emergency Medicine

Department of Emergency Medicine

Brooke Army Medical Center

Fort Sam Houston

TX

Disclosures

BJL declares that he has no competing interests.

Acknowledgements

Dr Brit J. Long would like to gratefully acknowledge Dr Marie R. Baldisseri and Dr Walid Khayr, previous contributors to this topic.

Disclosures

MRB and WK declare they have no competing interests.

Peer reviewers

Mary Jane Reed, MD, FACS, FASMBS

Associate Professor

Department of Critical Care Medicine and Department of General Surgery

Geisinger Medical Center

Danville

PA

Disclosures

MJR declares that she has no competing interests.

Janice Zimmerman, MD

Head

Critical Care Division

The Methodist Hospital

Houston

TX

Disclosures

JZ declares that she has no competing interests.

Djillali Annane, MD, PhD

Professor in Medicine at University of Versailles SQY

Director of the General ICU at Raymond Poincaré Hospital (AP-HP)

Director of the Center for Clinical Research and Technology Innovation (INSERM)

Garches

France

Disclosures

DA is an author of a number of references cited in this topic.

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