White phosphorus (WP) burns are a rare but devastating combined chemical-thermal injury caused by an incendiary agent used in military munitions, industrial manufacturing, and fireworks. WP ignites spontaneously at ~30°C in air, burns at ~800–1200°C, and continues to burn until deprived of oxygen or completely consumed. Death may result even with minimal burn surface area due to systemic absorption and toxicity.[1-3]
1. History
- Mechanism: military/combat exposure, industrial accident (munitions manufacturing), fireworks, or accidental contact with unexploded ordnance residues (e.g., WP mistaken for amber on beaches)[4]
- Time from exposure to presentation; any prehospital decontamination performed
- Was clothing removed immediately? Delayed removal leads to deeper burns[3]
- Were wounds kept moist during transport? (WP re-ignites when dry and exposed to air)
- Enclosed-space exposure → inhalation risk
- Quantity of WP involved, duration of contact
- Symptoms: severe, disproportionate pain relative to burn size; garlic-like or acrid odor; luminescent/smoking wounds in the dark[1][3]
2. Alarm Features
- Burns that continue to smoke or re-ignite — embedded WP particles still present
- Disproportionate pain or systemic illness relative to TBSA burned
- Signs of inhalation injury: stridor, dyspnea, carbonaceous sputum
- Cardiac arrhythmias or hemodynamic instability (hypocalcemia-induced)[2-3]
- Altered mental status, seizures (severe hypocalcemia)
- Dark/cola-colored urine (hemolysis, rhabdomyolysis)
- Jaundice or right upper quadrant pain (hepatotoxicity)
- Oliguria/anuria (acute renal failure)
3. Medications
- IV calcium gluconate — mandatory for correction of hypocalcemia[1][3]
- Aggressive IV opioid analgesia — WP burns are extremely painful[3]
- Tetanus prophylaxis per standard burn protocol
- Topical wound care: saline-soaked dressings (keep wounds moist to prevent re-ignition)
- Copper sulfate is NOT recommended — a Cochrane review found no evidence of benefit and documented harm including renal failure, hemolytic anemia, and death from systemic copper absorption[3][5-6]
- Wood's lamp (UV light) is the preferred safer alternative for identifying residual WP particles[3]
- Avoid silver sulfadiazine until all WP particles are removed (may obscure particles)
4. Diet
- NPO initially if surgical debridement anticipated
- High-protein, high-calorie diet once tolerating oral intake to support wound healing[3]
- Calcium and vitamin D supplementation as guided by serum levels
- Adequate hydration to support renal clearance of phosphorus and hemolysis byproducts
5. Review of Systems
- Respiratory: cough, dyspnea, stridor (inhalation injury/ARDS)[2][7]
- Cardiac: palpitations, chest pain, syncope (arrhythmia from hypocalcemia)
- GI: nausea, vomiting, abdominal pain, jaundice (hepatotoxicity from systemic absorption)
- Renal: decreased urine output, dark urine (hemolysis, renal failure)
- Neuro: paresthesias, muscle cramps, tetany, seizures (hypocalcemia)[8]
- MSK: muscle spasms, weakness
- Psych: confusion, agitation
6. Collateral History and Family History
- Witnesses to the event: duration of exposure, decontamination performed in the field
- Military context: type of munition, enclosed vs. open space
- Industrial context: Safety Data Sheet for specific WP compound, co-exposures (e.g., arsenic in some industrial settings)[7]
- Family history is generally not contributory unless there is a predisposition to cardiac arrhythmia (relevant given hypocalcemia risk)
7. Risk Factors
- Military personnel in active combat zones — most common context historically[3][9]
- Munitions factory workers[4][7]
- Fireworks handlers[1]
- Civilians in conflict zones
- Beachgoers in areas with WWII-era ordnance residues (Baltic Sea, North Sea)[4]
- Delayed clothing removal or failure to keep wounds moist during transport[3]
8. Differential Diagnosis
- Other chemical burns: hydrofluoric acid (also causes hypocalcemia), alkali burns, acid burns
- Thermal burns without chemical component
- Napalm burns (similar military incendiary mechanism)
- Magnesium burns (also burns in contact with water)
- Electrical burns (deep tissue injury disproportionate to surface)
- Radiation burns
- Distinguishing feature of WP: garlic-like odor, luminescent/smoking wounds in the dark, re-ignition when wounds dry[3-4]
9. Past Medical History
- Pre-existing renal or hepatic disease (increased vulnerability to systemic WP toxicity)
- Cardiac history (arrhythmia risk compounded by hypocalcemia)
- Prior calcium/parathyroid disorders
- Previous burn injuries or skin grafts
- Immunosuppression (infection risk)
10. Physical Exam
- Vital signs: tachycardia, hypotension (systemic toxicity, fluid losses); tachypnea (inhalation injury)
- Wound appearance: yellowish, necrotic, full-thickness burns; may be smoking or luminescent; garlic-like odor[3]
- Depth: typically deep, extending into subcutaneous fat due to high lipid solubility of WP[3]
- Examine in a darkened room — residual WP particles may glow or smoke, aiding identification
- Chvostek and Trousseau signs for hypocalcemia[8]
- Airway assessment: stridor, hoarseness, facial/oropharyngeal burns, singed nasal hairs
- Abdominal exam: hepatomegaly, RUQ tenderness (hepatotoxicity)
- Urine color: dark/cola-colored (hemoglobinuria)
11. Lab Studies
- Serum calcium (ionized) — hypocalcemia is common and potentially lethal[1][3]
- Serum phosphorus — hyperphosphatemia expected[3]
- BMP/CMP: renal function (BUN, creatinine), electrolytes, magnesium
- LFTs: AST, ALT, bilirubin (hepatotoxicity from systemic absorption)[2-3]
- CBC: hemolytic anemia (WP has hemolytic effects on erythrocytes)[3]
- Coagulation studies: PT/INR, fibrinogen (DIC risk)
- Urinalysis: hemoglobinuria, myoglobinuria
- Lactate, ABG/VBG: metabolic acidosis assessment
- CK: rhabdomyolysis
- Type and screen if significant burn or anticipated surgery
- Serial electrolyte monitoring every 4–6 hours in the acute phase[3]
12. Imaging
- Chest X-ray: baseline and if inhalation injury suspected (ARDS, pulmonary edema)
- Plain radiographs of burn area: WP particles may be radiopaque and visible on X-ray, aiding localization for debridement
- CT chest: if concern for significant inhalation injury or ARDS progression
- Imaging is otherwise guided by clinical findings and complications
13. Special Tests
- Wood's lamp (UV light): WP particles fluoresce under UV light — recommended safer alternative to copper sulfate for identifying embedded particles[3]
- Darkened room examination: residual WP particles may glow or produce visible smoke
- Bronchoscopy: if inhalation injury suspected (assess airway edema, carbonaceous deposits)
- TBSA calculation using standard burn assessment (Lund-Browder chart preferred)
- Echocardiography: if hemodynamic instability or concern for hypocalcemia-induced cardiomyopathy[10]
14. ECG
- Obtain ECG on all WP burn patients — cardiac monitoring is mandatory[3]
Expected findings from hypocalcemia
- Prolonged QTc interval (most common)[8][10]
- ST-segment changes (may mimic STEMI)[11]
- Risk of torsades de pointes and ventricular fibrillation[8]
- Continuous telemetry monitoring recommended during acute phase
- Hyperphosphatemia may compound cardiac effects
15. Assessment
- WP burns are a dual-mechanism injury — thermal (burns at ~800°C+) and chemical (ongoing oxidation and systemic absorption). Key clinical features that distinguish WP burns from standard thermal burns:[2-3]
- Severity is disproportionate to TBSA — small burns can be fatal due to systemic toxicity
- Burns are typically deep, full-thickness, extending into subcutaneous fat due to WP's high lipid solubility
- Progressive necrosis continues as long as WP particles remain embedded
- Systemic complications include hypocalcemia (most common), hyperphosphatemia, hepatorenal failure, hemolytic anemia, ARDS, and cardiac arrhythmias[2]
- Mortality at one major burn center decreased from 13.8% (1969–1985) to 0% (1986–2000) with improved protocols[9]
16. Treatment Plan
- Remove all clothing immediately (may ignite or re-ignite)[3]
- Cover wounds with saline- or water-soaked dressings — WP re-ignites when dry[3][12]
- Moist gauze is the most effective first-aid dressing for extinguishing WP and removing particles; avoid direct water streams which may splash WP[12]
- Standard ATLS/burn resuscitation principles
Emergency department/burn center
- Copious continuous irrigation with normal saline or water[1][3][13]
Identify and remove all WP particles using
- Wood's lamp (UV light) in a darkened room[3]
- Mechanical debridement with forceps[3]
- Do NOT use copper sulfate[3]
- IV calcium gluconate for hypocalcemia correction[1]
- Aggressive IV fluid resuscitation titrated to urine output[1]
- IV opioid analgesia
- Continuous cardiac monitoring and serial electrolytes (Ca²⁺, PO₄, Mg²⁺) every 4–6 hours[3]
- Tetanus prophylaxis
Definitive wound management
- Serial debridement of necrotic tissue
- Early excision and skin autografting for wounds not healing by 14 days[1]
- Porcine skin coverage or allografts as temporizing measures[1]
- High-protein diet to support wound healing[3]
17. Disposition
- All WP burns require admission, ideally to a verified burn center[9]
ICU admission for
- Burns >10% TBSA
- Inhalation injury
- Hemodynamic instability or arrhythmias
- Significant electrolyte derangements (hypocalcemia, hyperphosphatemia)
- Multi-organ dysfunction
- Burn surgery consultation for all cases
- Toxicology/Poison Control consultation recommended
- Ophthalmology if ocular exposure
- Pulmonology/critical care if inhalation injury
18. Follow Up / Return Precautions
- Return immediately for: wound re-ignition or smoking, increasing pain disproportionate to wound appearance, palpitations/syncope, dark urine, jaundice, shortness of breath, muscle spasms/tetany
- Follow-up with burn surgery within 48–72 hours of discharge (rare to discharge acutely)
- Serial wound checks for progressive necrosis or retained WP particles
- Long-term: scar management, functional rehabilitation, psychological support (especially in combat-related injuries)[3]
- Expected recovery: prolonged hospitalization is typical; mean length of stay historically 15–90+ days depending on era and burn severity[9]
- Most patients with significant burns require sequential surgical procedures for functional and cosmetic recovery[1]
References
1. The Management of White Phosphorus Burns. — Chou TD, Lee TW, Chen SL, et al. Burns : Journal of the International Society for Burn Injuries. 2001.
2. White Phosphorus Munitions: Pathophysiology, Clinical Management, and Multidisciplinary Perspectives on Burn Injuries and Humanitarian Challenges. — Wang M, Bai Y, Zhang X, Zhang J, Kang A. Frontiers in Public Health. 2025.
3. Interventions for Treating Phosphorus Burns. — Barqouni L, Abu Shaaban N, Elessi K. The Cochrane Database of Systematic Reviews. 2014.
4. Not All That Glistens Is Gold: Civilian White Phosphorus Burn Injuries. — Frank M, Schmucker U, Nowotny T, Ekkernkamp A, Hinz P. The American Journal of Emergency Medicine. 2008.
5. The Phosphorous Burn--a Preliminary Comparative Experimental Study of Various Forms of Treatment. — Eldad A, Simon GA. Burns : Journal of the International Society for Burn Injuries. 1991.
6. Acute copper sulfate poisoning resulting from dermal absorption. — Park KS, Kwon JH, Park SH, et al. American Journal of Industrial Medicine. 2018.
7. White Phosphorus Burns and Arsenic Inhalation: A Toxic Combination. — Berndtson AE, Fagin A, Sen S, Greenhalgh DG, Palmieri TL. Journal of Burn Care & Research : Official Publication of the American Burn Association. 2014.
8. American Thyroid Association Statement on Postoperative Hypoparathyroidism: Diagnosis, Prevention, and Management in Adults. — Orloff LA, Wiseman SM, Bernet VJ, et al. Thyroid : Official Journal of the American Thyroid Association. 2018.
9. Treatment of White Phosphorus and Other Chemical Burn Injuries at One Burn Center Over a 51-Year Period. — Barillo DJ, Cancio LC, Goodwin CW. Burns : Journal of the International Society for Burn Injuries. 2004.
10. Reversible Cardiac Dysfunction Associated With Hypocalcemia: A Systematic Review and Meta-Analysis of Individual Patient Data. — Newman DB, Fidahussein SS, Kashiwagi DT, et al. Heart Failure Reviews. 2014.
11. Severe Hypocalcemia Simulating ST-elevation Myocardial Infarction. — Ilveskoski E, Sclarovsky S, Nikus K. The American Journal of Emergency Medicine. 2012.
12. Experimental Comparison of Efficiency of First Aid Dressings in Burning White Phosphorus on Bacon Model. — Witkowski W, Surowiecka-Pastewka A, Biesaga M, Gierczak T. Medical Science Monitor : International Medical Journal of Experimental and Clinical Research. 2015.
13. 2024 American Heart Association and American Red Cross Guidelines for First Aid. — Hewett Brumberg EK, Douma MJ, Alibertis K, et al. Circulation. 2024.