Following extraction of the impacted mandibular canine, which involved the use of micromotor, the patient developed severe pain and ecchymosis as seen in the color plate. What can be the cause?: (A) Post surgical ecchymosis, (B) Herpes labialis activation, (C) Air emphysema, (D) Sodium hypochlorite injection
Answer is A. The information provided in the question and image leads to diagnosis of post surgical ecchymosis. The main symptom of emphysema is a crepitus of the swollen tissues