The current case report presents a rare oral pathology of Oral Focal Mucinosis (OFM). The patient developed marginal gingival inflammation subsequent to esthetic crown lengthening surgery. The differential diagnosis included candidal infection, foreign body gingivitis, and Desquamative Gingivitis (DG). An incisional biopsy was performed, indicating a definitive histopathological diagnosis of OFM. OFM is a lesion developing due to over production of hyaluronic acid by fibroblasts, compromising the normal collagen production. Treatment of OFM is excisional biopsy, however; its location near the gingival margin in the aesthetic zone required a minimally invasive surgical approach. Therefore, a less invasive treatment using corticosteroids was administered, leading to resolution of the inflammation.