Various inflammatory diseases and soft tissue pathologies in oral cavities are associated with diabetes mellitus; however, awareness of these complications is lacking worldwide. Periodontal diseases have been proposed as the sixth most prevalent complication of diabetes mellitus following the other diabetic complications. It has been reported as a more frequent oral complication of diabetes compared to other oral manifestations such as dry mouth and caries. Periodontitis is more frequent and severe in patients with diabetes with poor glycaemic control. Early identification and/or management of these oral manifestations may help in the early diagnosis of diabetes and in attaining better glycaemic control. Therefore, diabetic oral complications need to be identified and included in the ultimate care of diabetes in order to fight this chronic metabolic disease effectively.