Electrosurgeries are performed routinely in clinical dentistry, and it has a great relevance to general dentists as it provides a bloodless field while performing the gingivectomy, gingivoplasty, crown lengthening, frenectomy, depigmentation etc. But the overzealous use of electrocautery leads to delayed wound healing leading to sometimes necrosis of alveolar bone and gingiva. The present case reports the osteonecrosis of the alveolar bone of the mandible following a careless handling of electrocautery while managing a case of gingival hyperpigmentation.