Introduction: Nasal septal abscess is the presence of pus between the nasal septum and its mucosa. It Is a rare condition but there are risks of fatal complications if left untreated, it can occur spontaneously or after trauma of nasal septum. Treatments include antibiotics, surgical drainage of abscess, and treatment of its etiology.Case Report: A case of a post-traumatic septal abscess has observed in a 11-year-old child Who was presented with a 5-day history of nasal obstruction, swelling and pain. We have performed incision and drainage with administration of antibiotic, the patient showed satisfactory recovery without any complication.Conclusion: Nasal septal abscess is rare; it can be accompanied by fatal complications if left untreated.