“…Suppurative CG is seen in immunosuppressed patients (AIDS, transplant) with oral infections of variable causes, including candidiasis, herpes simplex, recurrent aphthosis, and ulceronecrotic gingivostomatitis with severe xerosis. 1,3,5 The differential diagnosis of CG includes contact cheilitis attributed to irritants or allergic contactants such as cheilitis medicamentosa; plasma cell cheilitis, which is an idiopathic periorificial reactive mucositis with abundant plasma cell infiltrate; exfoliative cheilitis related to factitial processes such as lip licking; and cheilitis granulomatosa affecting the upper and lower lip, and characterized by tuberculoid granulomatous inflammation, lingua plicata, and peripheral seventh nerve palsy (Melkersson-Rosenthal syndrome).…”