For an Otolaryngologist adenotonsillectomy is a commonly performed surgery. The most common complication is post-operative bleeding. However, it can potentially be associated with several other complications. Subcutaneous emphysema after adenotonsillectomy one of the rare complication but potentially life-threatening. Here we report the case of 6 years old boy who developed cervicofacial subcutaneous emphysema and pneumomediastinum following adenotonsillectomy.