Ludwig's Angina

Ludwig's angina is a rapidly progressive, potentially fatal bilateral cellulitis of the sublingual and submandibular spaces, most commonly of odontogenic origin, with the primary threat being airway obstruction from posterior tongue displacement. [1-2] Mortality has decreased from >50% in the pre-antibiotic era to approximately 8%, but it remains a true surgical emergency. [1][3]

• Onset and progression: Rapid onset (hours to days) of neck swelling, floor-of-mouth pain, and dysphagia; ask about speed of progression — this infection escalates quickly [2]
• Dental history: Recent dental infection, extraction, procedure, or toothache — odontogenic source in ~90% of cases (classically 2nd and 3rd lower molars) [4-6]
• Symptom characterization: Severe neck pain, bilateral submandibular swelling, dysphagia, odynophagia, drooling, "hot potato" voice/dysphonia, fever, malaise [7-8]
• Airway symptoms: Ask specifically about difficulty breathing, positional dyspnea (worse supine), voice changes, and inability to handle secretions [2]
• Important negatives: Absence of stridor does not rule out impending airway compromise; trismus is a late finding suggesting advanced disease [2]

• Stridor — suggests impending airway crisis [8]
• Inability to swallow secretions / drooling [7]
• Rapidly expanding neck swelling ("bull neck")
• Trismus — late finding indicating severe disease [2]
• Respiratory distress, tachypnea, use of accessory muscles [9]
• Dysphonia or muffled voice [7]
• Inability to lie supine — critical sign of airway compromise
• Signs of sepsis: fever, tachycardia, hypotension
• Chest pain or pleuritic symptoms — may indicate descending mediastinitis [6][10]

• Empiric IV antibiotics (broad-spectrum covering streptococci, staphylococci, gram-negatives, and anaerobes):
  • Ampicillin-sulbactam 3 g IV q6h — commonly used first-line [11]
  • Penicillin G + clindamycin — classic combination [3][5]
  • Piperacillin-tazobactam or meropenem for immunocompromised or critically ill patients
  • Add vancomycin if MRSA risk factors present [11]
• Dexamethasone — adjunctive use is controversial; may reduce edema and potentially decrease need for airway intervention, but evidence is limited to case reports. All reported cases used steroids alongside antibiotics and most still required surgery [12]
• NSAIDs should be avoided — associated with worsening necrotizing cervical cellulitis in case series [13]
• Avoid oral antibiotics alone — conservative management with IV antibiotics alone carries a risk of airway compromise nearly 10 times higher than early surgical drainage (26.3% vs. 2.9%) [1]

• NPO in the acute setting — anticipate airway intervention and/or surgical drainage
• Severe dysphagia and trismus typically preclude oral intake
• IV fluid resuscitation and nutritional support as needed
• Transition to soft/liquid diet as swelling resolves and swallowing function returns

• HEENT: Dental pain, jaw stiffness, ear pain, sore throat, voice changes, drooling
• Respiratory: Dyspnea, stridor, positional breathing difficulty, cough
• Constitutional: Fever, chills, rigors, malaise, night sweats
• GI: Dysphagia, odynophagia, inability to eat/drink
• Cardiovascular: Chest pain (mediastinal extension), palpitations
• Neurologic: Altered mental status (sepsis), headache (intracranial extension — rare) [7]

• Dental care history: Last dental visit, known caries, prior dental infections or extractions
• Recent oral procedures or trauma to the oral cavity [1]
• Medication history: Recent antibiotic use (may mask early symptoms), NSAID use (associated with worse outcomes), antipsychotic use (may mask pain and impair self-care) [13-14]
• Social history: Alcohol use disorder, IV drug use, homelessness, malnutrition — all increase risk [7]
• Family history is generally not contributory, though familial immunodeficiency conditions may be relevant

• Poor dentition / dental caries — most important risk factor [2][5]
• Diabetes mellitus — present in ~38% of patients in large series [5]
• Immunosuppression: HIV/AIDS, malignancy, chemotherapy, chronic steroid use [1][7]
• Alcohol use disorder [7]
• Malnutrition [7]
• Obesity — may contribute to airway compromise [14]
• Recent dental procedures [1]
• Low socioeconomic status / limited access to dental care [15]
• Delayed treatment of dental infections (notably increased during COVID-19 pandemic) [15]

• Peritonsillar abscess — typically unilateral, uvular deviation, trismus; does not involve floor of mouth bilaterally
• Parapharyngeal abscess — unilateral neck swelling, medial displacement of tonsil/lateral pharyngeal wall
• Retropharyngeal abscess — posterior pharyngeal wall swelling, neck stiffness, dysphagia; more common in children
• Submandibular abscess (unilateral) — localized fluctuance without bilateral floor-of-mouth involvement
• Angioedema — non-tender, non-erythematous swelling; no fever; may have urticaria; medication history (ACE inhibitors)
• Salivary gland infection (sialadenitis/sialolithiasis) — unilateral, gland-specific swelling, worsens with eating
• Cervical lymphadenitis — discrete, tender lymph nodes without diffuse induration
• Epiglottitis — sore throat, drooling, muffled voice, but no submandibular swelling
• Necrotizing fasciitis of the neck — may overlap with or complicate Ludwig's angina; crepitus, skin necrosis [13][15]
• Oral/oropharyngeal malignancy — subacute course, weight loss, risk factors

• Prior episodes of dental infection or deep neck space infection
• Diabetes mellitus — screen if not previously diagnosed [5]
• Immunocompromising conditions
• Prior head/neck surgery or radiation
• Mandibular fractures [1]
• Chronic medical conditions affecting wound healing

• Vital signs: Fever, tachycardia, tachypnea; hypotension suggests sepsis
• General: Toxic-appearing, may be sitting upright and leaning forward ("tripod" or "sniffing" position), drooling
• Neck: Bilateral submandibular and submental brawny induration (woody, non-fluctuant) — hallmark finding [1][4]
• Floor of mouth: Elevated, tender, indurated — tongue is displaced posteriorly and superiorly [1]
• Tongue protrusion beyond the teeth [7]
• Trismus — late finding, indicates severe disease [2]
• Oropharynx: Erythematous, edematous; assess for dental caries, periapical abscess
• Airway assessment: Voice quality, stridor, ability to handle secretions, Mallampati score (likely distorted)
• Skin: Overlying erythema, warmth; crepitus suggests gas-forming organisms or necrotizing fasciitis
• Cervical lymphadenopathy may be present

• CBC with differential: Leukocytosis with left shift expected
• CRP / ESR: Elevated inflammatory markers
• BMP: Assess renal function, glucose (screen for diabetes)
• Lactate: If sepsis suspected
• Blood cultures: Obtain before antibiotics if possible
• Wound/abscess cultures (aerobic and anaerobic): Obtain at time of surgical drainage — most common organisms are Streptococcus spp., Staphylococcus spp., and mixed anaerobes [4][7]
• Coagulation studies: If surgical intervention anticipated
• Procalcitonin: May help guide antibiotic duration

• CT neck with IV contrast — preferred first-line imaging if the patient can safely leave the ED and tolerate lying supine [2]
  • Delineates extent of infection across fascial spaces
  • Identifies drainable abscess collections
  • Evaluates for parapharyngeal, retropharyngeal, and mediastinal extension
• Point-of-care ultrasound (POCUS) — useful adjunct, especially in patients who cannot tolerate lying supine. The floor-of-mouth ultrasound (FOMUS) protocol using linear and curvilinear probes can assess submandibular collections [2][16]
• CT chest — if concern for descending mediastinitis or pleural empyema [6-7]
• Panoramic dental radiograph (Panorex) — may identify offending tooth
• Imaging is NOT required to initiate treatment — Ludwig's angina is a clinical diagnosis; do not delay airway management for imaging [17]

• Flexible nasopharyngoscopy — assess supraglottic edema and airway patency (if available and safe)

1. Acute Upper Airway Obstruction. — Eskander A, de Almeida JR, Irish JC. The New England Journal of Medicine. 2019.

2. Diagnosis and Management of Ludwig's Angina: An Evidence-Based Review. — Bridwell R, Gottlieb M, Koyfman A, Long B. The American Journal of Emergency Medicine. 2021.

3. Ludwig's Angina: An Update. — Patterson HC, Kelly JH, Strome M. The Laryngoscope. 1982.

4. Ludwig's Angina: A Clinical Review. — Srirompotong S, Art-Smart T. European Archives of Oto-Rhino-Laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies : Affiliated With the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery. 2003.

5. Management of Ludwig's Angina With Small Neck Incisions: 18 Years Experience. — Bross-Soriano D, Arrieta-Gómez JR, Prado-Calleros H, Schimelmitz-Idi J, Jorba-Basave S. Otolaryngology--Head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery. 2004.

6. Ludwig's Angina. — Fritsch DE, Klein DG. Heart & Lung : The Journal of Critical Care. 1992.

7. Ludwig's Angina and a Complicated Course of Streptococcus Constellatus Management. — Distler K, Hammad A, Ryder E, Pokharel S. Journal of Intensive Care Medicine. 2025.

8. Ludwig's Angina in Children. — Hartmann RW. American Family Physician. 1999.

9. Case Report: Ludwig's Angina - 'The Dangerous Space'. — Vasanth S, Chandran S, Pandyan DA, et al. F1000Research. 2024.

10. Ludwig Angina: A Disease of the Past Century. Case Report. — Doldo G, Albanese I, Macheda S, Caminiti G. Minerva Anestesiologica. 2001.

11. Salivary Gland Disorders: Rapid Evidence Review. — Kim MJ, Milliren A, Gerold DJ. American Family Physician. 2024.

12. Ludwig's Angina and Steroid Use: A Narrative Review. — Tami A, Othman S, Sudhakar A, McKinnon BJ. American Journal of Otolaryngology. 2020.

13. Ludwig's Angina: A Diagnostic and Surgical Priority. — Vallée M, Gaborit B, Meyer J, et al. International Journal of Infectious Diseases : IJID : Official Publication of the International Society for Infectious Diseases. 2020.

14. Fatal Airway Obstruction Due to Ludwig's Angina From Severe Odontogenic Infection During Antipsychotic Medication: A Case Report and a Literature Review. — Yamaguchi R, Sakurada K, Saitoh H, et al. Journal of Forensic Sciences. 2021.

15. Ludwig's Angina: Higher Incidence and Worse Outcomes Associated With the Onset of the Coronavirus Disease 2019 Pandemic. — Canas M, Fonseca R, De Filippis A, et al. Surgical Infections. 2023.

16. Floor of the Mouth Ultrasound Assessment in Ludwig's Angina. — Okonkwo N, Montoya K, Shokoohi H. The Journal of Emergency Medicine. 2025.

17. Ludwig Angina After First Aid Treatment: Possible Etiologies and Prevention-Case Report. — Shemesh A, Yitzhak A, Ben Itzhak J, Azizi H, Solomonov M. Journal of Endodontics. 2019.