Infections originating in the roots of teeth can be identified with a dental X-ray. A CT scan of the neck with contrast material is used to identify deep neck space infections. If there is suspicion of the infection of the chest cavity, a chest scan is sometimes done. Angioneurotic oedema, lingual carcinoma and sublingual hematoma formation following anticoagulation should be ruled out as possible diagnoses. Microbiology There are a few methods that can be used for determining the microbiology of<unk> . Traditionally, a culture sample is collected although it has some limitations, primarily being the time-consuming and sometimes unreliable results if the culture is not processed correctly.<unk>  is most often found to be polymicrobial and anaerobic. Some of the commonly found microbes are Viridans Streptococci, Staphylococci, Peptostreptococci, Prevotella, Porphyromonas and Fusobacterium.
Ludwig's angina
Streptococcal pharyngitis
Herpes esophagitis
Tropical ulcer
Lymphocytic esophagitis
Cytomegalovirus esophagitis
Eosinophilic esophagitis
Rhinitis medicamentosa