Background: Facial cellulitis is a life threatening, hard, diffuse, non-fluctuating soft tissue infection that is not confined and has a tendency to spread. Case Report: A 47-year-old female complaint of pain and swelling in left side of the face. On examination a diffuse shiny swelling evident in the left side of the face which was hard, tender, warm and non pinchable on palpation. The patient was managed by Incision & Drainage (I & D) on intra-oral deep vestibular incision, offending tooth was extracted and corrugated rubber drain was placed & followed with IV antibiotics for 3 days. On one week follow up patient had complete resolution of pain, swelling and trismus. Conclusion: Ophthalmic, ENT, and maxillofacial specialists perform a multidisciplinary approach to diagnose and treat facial space infection. Incision and drainage is mandatory and life-saving even if there is no fluctuation of swelling to allow drainage inflammatory fluids