If the dentures are not used properly, cleaned and maintained, and especially if some general diseases coexist (e.g., diabetes), various lesions in the mouth may occur. Lesions can be present for a long time without being noticed, because they usually do not cause discomfort or pain. The most common lesion is stomatitis, which in the Albania population reaches the percentage of 30% to 40% of those who wear dentures. It is an inflammation of the palate which is caused either by constant injury or by a bacterial infection. It is characteristic that most of the time it is not accompanied by any symptoms, while sometimes it coexists with inflammation in the corners of the mouth (conjunctivitis). The dentist will find the cause of the problem and treat it accordingly, either by repairing the denture or by prescribing medication or both. In order to prevent damage, it is necessary: a visit to the dentist once a year to check the application of dentures and the general health of the mouth; to remove the dentures at night so that the mouth “rests” and to clean carefully and systematically both the dentures and the mouth.