Introduction <p>Nonhealing ulcers on the lateral border of the tongue are a common clinical challenge, often resulting from chronic trauma but carrying a risk of malignant transformation. Early diagnosis and intervention are crucial to prevent complications and rule out malignancy.</p> Methods <p>A 57-year-old female presented with a persistent, painful ulcer on the right lateral border of the tongue for three weeks, associated with weight loss and a tender submandibular lymph node. Clinical examination revealed a 2 cm oval ulcer with indurated base, pseudomembranous slough, and erythematous margins adjacent to a sharp mandibular molar remnant. Toluidine blue vital staining was performed to assess for dysplastic changes. The suspected etiology—sharp tooth remnant and infected root stumps—was addressed by extraction.</p> Results <p>Following extraction of the offending tooth remnant and administration of analgesics, antibiotics, and topical antiseptics, the patient was reviewed after ten days. The ulcer showed complete regression with no residual pain or tenderness. Toluidine blue staining at the margins was positive initially, but the lesion resolved clinically after removal of the traumatic factor.</p> Discussion and Conclusion <p>Chronic traumatic ulcers on the lateral tongue, especially in older adults, require careful evaluation to exclude malignancy. Removal of the causative irritant often leads to resolution, but persistent or suspicious lesions warrant biopsy. Toluidine blue staining can aid in identifying dysplastic changes but should be interpreted cautiously, as false positives may occur in inflammatory lesions. Regular follow-up and documentation are essential for monitoring healing and ensuring early detection of malignant transformation.</p>