Subcutaneous facial emphysema (SFE) following routine dental operative procedure is an uncommon but potentially life‐threatening complication. The present case details a Class V restoration where air was introduced into the fascial tissue planes via the gingival sulcus from the use of an air‐driven dental handpiece. Although the SFE is usually self‐limiting within 3–10 days, such instances should be regarded as a medical emergency as in severe cases, the air may spread to the neck, mediastinum and thorax to result in cervicofacial emphysema with potential pneumomediastinum and pneumothorax.