True about ludwig's angina -a) Rapidly spreading cellulitis of neckb) H. Influenzae is most common organismc) Edema of floor of mouthd) Sub- lingual and sub- maxillary spaces are involvede) When operated ↓GA chances of aspiration, shock can develop
Clinical features 

In Ludwig's angina there is usually cellulitis of the tissue rather than frank abscess.
Marked difficulty in swallowing (odynophagia).
Varying degrees of trisumus.
On involvement of sublingual space, floor of the mouth is swollen, oedematous and tongue seems to be pushed up and back.
On involvement of the submaxillary space the submental and submandibular regions become swollen and tender and impart woody- hard feel. Tongue is progressively pushed upwards and backwards threatening the airway.
Laryngeal edema may appear.

Complications

Aspiration pneumonia and septicemia.
Airway obstruction due to laryngeal edema or swelling and pushing back of tongue.
Spread of infection to parapharyngeal and retropharyngeal space and thence to the mediastinum.
abd
acd
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