Nonhealing painless lesions of long duration that did not respond to conventional therapy are the diagnostic challenge to clinician. Two such atypical cases of nonhealing oral lesions manifesting as gingival swelling and odontogenic cyst diagnosed histopathologically as primary oral tuberculosis are presented here. The purpose of this presentation is to point out that, in the absence of any apparent systemic infection the oral tuberculous lesions in the mouth may be discovered before the diagnosis of systemic tuberculosis and the histopathological finding of a persistent nonhealing oral lesion is an important aid in arriving at a diagnosis of this underlying condition.