---
title: "Ludwig’s Angina"
description: "Detailed anatomy, clinical presentation, and management of submental, submandibular, and sublingual space infections, including Ludwig’s Angina."
source: "The ENT Resident"
author: "Dr. Mausumi Das"
canonical_url: "https://www.theentresident.com/ent-notes-lectures/ludwig-angina"
categories: ["Neck"]
video: "https://www.youtube.com/watch?v=0CP1m1Fx-64"
image: "https://media.theentresident.com/og-images/ludwig-angina.png"
---

# Ludwig’s Angina

Detailed anatomy, clinical presentation, and management of submental, submandibular, and sublingual space infections, including Ludwig’s Angina. Watch the full video lecture on YouTube: https://www.youtube.com/watch?v=0CP1m1Fx-64

## 🧠 Anatomy and Infections of Submental, Submandibular & Sublingual Spaces

This post discusses the three **primary mandibular spaces**—submental, submandibular, and sublingual—including their boundaries, contents, communication pathways, infections, and **Ludwig’s angina**, which results from their bilateral involvement.

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### 📍 Submental Space

- **Location**: Between the *mylohyoid* (superiorly) and *platysma* (inferiorly) in the midline under the chin.

- **Boundaries**:
  - **Superior**: Mylohyoid muscle  
  - **Inferior and anterior**: Superficial layer of deep cervical fascia  
  - **Lateral**: Anterior belly of digastric (on both sides)  
  - **Posterior**: Hyoid bone  

- **Contents**:
  - Submental lymph nodes  
  - Areolar connective tissue  
  - Anterior jugular veins  

### 📍 Submandibular Space

- **Location**: Below the mylohyoid, in the submandibular triangle.

- **Boundaries**:
  - **Superior**: Floor of mouth mucosa  
  - **Lateral**: Mandible  
  - **Antero-inferior**: Anterior belly of digastric  
  - **Postero-inferior**: Posterior belly of digastric  
  - **Posterior**: Hyoid bone  

- **Contents**:
  - Submandibular gland  
  - Submandibular lymph nodes  
  - Hypoglossal nerve  
  - Nerve to mylohyoid  
  - Facial and lingual artery branches  
  - Lingual nerve  

### 📍 Sublingual Space

- **Location**: Above the mylohyoid.

- **Contents**:
  - Sublingual gland  
  - Wharton’s duct (submandibular duct)  

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### ⚠️ Submental Space Infection

- **Source**: Infection of anterior mandibular teeth (below mylohyoid)

- **Presentation**:
  - Erythema and induration in submental area  
  - Pain and tenderness  
  - Fluctuation may be positive  

- **Treatment**:
  - IV fluids, antibiotics, analgesics  
  - Submental incision and drainage  

---

### ⚠️ Submandibular Space Infection

- **Source**:
  - Infection from 2nd or 3rd mandibular molars (roots below mylohyoid)
  - Mandibular fractures, foreign bodies, malignancies  

- **Presentation**:
  - Swelling starts at inferior lateral mandible border  
  - Pain, fever, malaise, toxic look  

- **Treatment**:
  - IV antibiotics and fluids  
  - Incision & Drainage

>What is the site of incision for **I&D** in Submandibular Space Infection?

- **Complications**:
  - Airway obstruction 
  - Aspiration pneumonia, lung abscess  
  - Ludwig's angina, osteomyelitis, tongue necrosis  

>What is the Differential Diagnosis of Submandibular Space Infection?

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### ⚠️ Sublingual Space Infection

- **Source**: 
    - Dental caries of premolar/first molar (above mylohyoid)
    - Fractures
    - Malignancy

- **Presentation**:
  - Intraoral lingual swelling (floor of mouth)  
  - **Minimal extraoral swelling**  
  - Dysphagia, odynophagia  
  - Floor of mouth edema and induration  

- **Treatment**:
  - IV fluids, antibiotics, analgesics  
  - **Intraoral incision and drainage** if localized  

---

### 🔥 Ludwig’s Angina

> **Definition**: Rapidly spreading **bilateral gangrenous cellulitis** of submental, submandibular, and sublingual spaces.

- **Source**:
  - Dental infections (80% cases)  
  - Submandibular sialadenitis  
  - Oral injuries, fractures, dental extraction trauma  
  - Mandibular malignancy, osteoradionecrosis  

- **Microbiology**:
  - Mixed flora – aerobes and anaerobes  
  - *Alpha-hemolytic streptococci*, *staphylococci*, *bacteroides*  
  - Occasionally *H. influenzae*, *E. coli*, *pseudomonas*

### 🩺 Clinical Features of Ludwig’s Angina

- Odynophagia, dysphagia  
- Trismus  
- Floor of mouth swelling → tongue pushed **upward and backward**  
- **Woody hard induration** of submandibular area  
- Drooling, halitosis, fever, malaise  
- Risk of **airway obstruction** 

### 🛠️ Treatment of Ludwig’s Angina

- IV fluids, IV antibiotics  
- **Intraoral drainage** → if localized to sublingual space  
- **External drainage** → for submandibular involvement  
- **Tracheostomy**

>What are the indications of Rapid surgical intervention in **Ludwig's Angina**? 

>What are the causes of **difficult oral intubation** in **Ludwig's Angina**? 

### ⚠️ Complications of Ludwig’s Angina

- Airway obstruction  
- Mediastinitis  
- Aspiration pneumonia  
- Lung abscess  
- Septicemia  
- Internal jugular vein thrombosis  
- Carotid artery erosion  

**💡 Pro Tip**: Always examine oral cavity and submental/submandibular regions in patients with odontogenic infections, and **act early** to prevent life-threatening complications.

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## About This Note

This free ENT note on Ludwig’s Angina was written by Dr. Mausumi Das and is paired with a corresponding video lecture.

Canonical page of this note: https://www.theentresident.com/ent-notes-lectures/ludwig-angina

When citing or referencing this content, please credit The ENT Resident and link to the canonical page above.

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The ENT Resident is an educational website and resource library created by Dr. Mausumi Das (MS ENT) for ENT residents, ENT postgraduates preparing for exams, and MBBS students.

Dr. Mausumi Das writes the notes, draws the diagrams, and records the lectures herself.

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The ENT Resident provides educational material for medical learning and revision. It does not provide patient-specific medical advice, diagnosis, or emergency care, and it is not a substitute for evaluation by a qualified healthcare professional.

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