 There are many possible causes, including nutritional deficiencies (iron, B vitamins, folate), contact allergy, infection ("Candida albicans", "Staphylococcus aureus" or β-hemolytic streptococci) and edentulism (often with overclosure of the mouth and concomitant denture-related stomatitis), and others.Also termed "lip dermatitis", eczematous cheilitis is a diverse group of disorders which often have an unknown cause.Chronic eczematous reactions account for the majority of chronic cheilitis cases.