OBJECTIVE: To conduct a former patient of the right orbit subperiosteal abscess. CASE REPORT: teenager, male, 14 years old, Lambaré, Paraguay, a student with a picture of 72 hours of developing swelling at the level of the upper eyelid and lower right of insidious onset, progressive growth, to reach completely close the eye on the same side. Accompanying table with fetid purulent rhinorrhea, in moderate quantity both anterior and posterior and fever peaks and alternations of visual acuity by referring the Ophthalmology Clinic, from which they arise to our service. CONCLUSION: postseptal cellulite is a disease most common in children older than 5 years, is characterized by ocular proptosis, decreased vision and eye movements, fever. Presents numerous complications, described in this report constitute the subperiosteal abscess, a complication feared by the ignorant possible eye damage, which will progress if it does not drain on time and effectively. The treatment service is Functional Endoscopic Surgery. In this case it was effective, with good development of the patient, reducing ocular proptosis, and improving eye movements and visual acuity to reach normality.