The diagnosis is usually made based upon the clinical appearance, and swabs can be taken of the surface of the<unk> . Investigations to rule out possibility of diabetes may be indicated. Tissue biopsy is not usually indicated, but if taken shows histologic evidence of proliferative or degenerative responses and reduced keratinization and epithelial atrophy. Classification The Newton classification divides<unk>  into three types based on severity. Type one may represent an early stage of the condition, whilst type two is the most common and type three is uncommon. * Type 1 - Localized inflammation or pinpoint hyperemia * Type 2 - More diffuse erythema (redness) involving part or all of the mucosa which is covered by the<unk>  * Type 3 - Inflammatory nodular/papillary hyperplasia usually on the central hard palate and the alveolar ridge
Denture-related stomatitis
Contact stomatitis
Streptococcal intertrigo
Phototoxic tar dermatitis
Aphthous stomatitis
Herpetic gingivostomatitis
Oral allergy syndrome
Neutrophilic eccrine hidradenitis