This is a report of a case of an unusual oral lesion after the placement of mini implants for the retention of a mandibular overdenture. A patient received four 2-mm-wide dental implants in the anterior mandible and had her mandibular denture relined with a soft material. After 3 months, she was not wearing her mandibular denture, and two nodular ulcerated lesions were observed near the mini implants. The lesions ceased following excision and regular denture wearing. Clinical and microscopic examination led to the diagnosis of traumatic ulcerative granuloma with stromal eosinophilia (TUGSE). TUGSE is rare lesion with a benign course that may occur following injury of the oral mucosa by mini implants under certain circumstances.