Oral Lichen Planus is a common muco-cutaneous disorder characterized by an inflammatory skin condition that causes an itchy, non-infectious rash of small, polygonal, flat-topped pink or purple lesions, predominantly on the oral and skin (arms and legs) areas. It is often linked to diabetes mellitus and vascular hypertension, and this triad is referred to as Grinspan’s Syndrome. We present a case of a 50-year-old female patient with characteristic lesions of oral erosive lichen planus on the buccal mucosa and gingiva, who has a history of vascular hypertension and has been diagnosed with type II diabetes mellitus.