Diabetes is a systemic disorder which can cause periodontitis, dental caries and other oral conditions which include fungal infections, salivary gland dysfunction, neuropathy and mucosal disorders. Many of these lesions can be easily examined and documented by non-dental providers. The disease can affect oral cavity, eyes, nerves, kidneys, heart as well as other parts of your body. Diabetes lowers the resistance against infection and thus body becomes prone to infection, cause soreness, ulcers and the healing process also slows down. Smoking in diabetics makes these problems worse. Good blood glucose control is key to control and prevent oral problems. Keywords: Diabetes mellitus; Infections