Eczematous cheilitis is a type of lip inflammation that can be caused by exogenous factors (irritant contact cheilitis, allergic cheilitis) or endogenous factors (atopic cheilitis) . Common sources of allergens include lipsticks and other lip care products, toothpaste and dental materials, foods, medications, and nail varnish. Lip-licking is the major cause of irritant contact cheilitis, and other common causes of irritant cheilitis include cosmetics, foods, and environmental factors. Allergic contact cheilitis is identified in at least one-quarter of cases of eczematous cheilitis, and common sources of allergens include lipsticks and other lip care products, toothpaste and dental materials, foods, medications, and nail varnish. Patch testing is very useful in eczematous cheilitis as at least one-quarter of cases involve an allergic reaction. Testing should include the standard series as well as extended series such as for lipsticks, toothpaste, and others as suggested from the history. Testing the patient’s own products ‘as is’ is important. Photopatch testing may also be useful. The relevance of positive reactions must be considered.

Ingredients or materials that can cause cheilitis include:

• Camphor: This ingredient should be avoided while lips are chapped.
• Eucalyptus: This ingredient should be avoided while lips are chapped.
• Nickel sulfate: This is a common contact allergen that can cause cheilitis.
• Potassium dichromate: This is a common contact allergen that can cause cheilitis.
• Castor oil: This is a common contact allergen that can cause cheilitis.
• Patients products: These are the most common contact allergens that cause cheilitis.
• Ceramides: This ingredient can be used to moisturize lips.
• Dimethicone: This ingredient can be used to moisturize lips.
• Hemp seed oil: This ingredient can be used to moisturize lips.
• Mineral oil: This ingredient can be used to moisturize lips.
• Petrolatum: This ingredient can be used to moisturize lips.
• Shea butter: This ingredient can be used to moisturize lips.
• Sun-protective ingredients: These ingredients, such as titanium oxide or zinc oxide, can be used to protect lips from the sun.

It is important to note that the effectiveness of these ingredients or materials may vary depending on the individual and the cau...