We report our clinical opinion on the cause of a tongue lesion referred to us as a diagnostic dilemma with a chronic painful raised erythematous midline lesion on the dorsum of the tongue that was unresponsive to conventional antifungal treatment. The patient, a 10-year-old child, was found to have a deep palatal vault and the lesion was identified to be caused due to a habitual suction force applied repetitively by the tongue against the palatal vault. Simple reminder appliance therapy consisting of a removable appliance produced habit cessation and relief for the lesion from suctional force and was sufficient to produce spontaneous resolution of the lesion. Our case illustrates a tongue lesion with an unlikely habit-related cause. In our opinion, this fact may be of use to other dentists to consider among the existing differential diagnoses available for isolated red lesions occurring on the dorsum of the tongue.