Disorders of the mouth can be dental or GI in origin and interfere with nutrition. They are caused by poor dental hygiene, infections, inflammation, and cancer. Peridontal disease attacks below the gum line and causes the attachment of the tooth and supporting tissues to break down. Candidiasis is a fungal infection caused by Candida albicans that occurs in the mouth. Cancer of the mouth can occur on the lips, tongue, pharynx, or oral cavity and is increased by tobacco or alcohol use. Disorders of the esophagus include esophageal cancer, achalasia, esophageal varices, and GERD. Esophageal cancer risks include alcohol and tobacco use and presents with dysphag