Gingival enlargement (GE) is an increase in the size of the gingiva. It may be due to inflammation caused by extensive plaque accumulation, intake of drugs, systemic conditions like pregnancy and puberty, systemic diseases such as leukemia or Wegener's granulomatosis, hereditary gingival fibromatosis, and neoplastic or false enlargement. Idiopathic GE is the massive increase in the size of the gingiva with an unknown etiology. It may have a hereditary basis, be linked to physical impairment, or begin with eruption of primary or permanent dentition. It is also referred as gingivomatosis, hereditary gingival fibromatosis, elephantiasis gingivae, gigantism of the gingiva, or congenital macrogingivae. The enlarged gingiva compromises oral hygiene maintenance, which secondarily adds to the inflammatory component of enlargement. Altogether, this exaggerates the existing condition. This type of extensively disfigured gingiva affects speech, mastication, and esthetics, causes halitosis, and disturbs the overall well-being of the individual. Surgical removal of the enlarged gingiva along with meticulous non-surgical means of plaque control is expected to provide a satisfactory functional and esthetic outcome. This case report presents a rare case of long-standing massive grade III GE extending up to the occlusal level in a 17-year-old systemically healthy, non-syndromic young female involving both arches, thereby posing a diagnostic dilemma. It was treated by gingivectomy using a conventional technique to facilitate precise incision, lower cost, and faster re-epithelialization. This was followed by gingivoplasty using electrocautery. The postoperative results of three months were satisfactory in terms of function and esthetics with uneventful healing. Further follow-up is ongoing for the same.