Infections of the deep spaces of the neck (peritonsillitis, retropharyngeal, lateropharyngeal) may be secondary to pharyngeal infections, odontogenes and other structures that are close, as the salivary glands. They are usually caused by a flora multimicrobiane. The gram negative bacilli are isolated in critically ill patients. These processes are more common in young adults with poor dental hygiene, and Immunosuppressed in diabetics. Male patient, 28 years old patient with no known underlying disease, pre-hospital with a history of 48 hours of onset of pain at the lower right second molar and fever of 38 °C. In the table is added submandibullary swelling and difficulty opening the mouth. On physical examination turns out to level the right submandibullary swelling, pain with inflammatory signs, grade III oroscopy trismus with mouth opening of 1 cm, teeth in fair condition, purulent discharge appears at the lower right second molar pressing the tumor neck. The patient presents with torticollis on the right side. No significant adenopathy is located. Is held tomography contrast neck and face where all notes in the region parapharyngeal, laterocervical, submandibular and retropharyngeal of approximately 4 cm in diameter. It is realized Computerized Tomography undertake treatment with amoxicillin sulbactam 4.5 g / day plus surgical drainage and sends material for cultivation, in which negative returns. Patient shows good postoperative evolution.