Etiology = appear to be delayed cell-mediated immune responses; edema of the subcutaneous tissue; contact allergies and sensitivity to food products, flavoring agents, dental hygiene products, dental restorative products; Lips and face may become swollen; gingiva is the problem area of involvement; buccal mucosa and tongue may appear enlarged, with folding leukoplakia; Fiery red gingiva; Contact allergies usually associated with dental products including toothpaste and mouth rinses, specific foods such as cinnamon, wheat, dairy products, chocolate, eggs, and peanuts; sodas and chewing gums