What causes lip eczema?

What causes lip eczema?

Potential causes of eczema on the lips include:

• Allergens in the environment, food, lip products or medications.
• Eczema (atopic dermatitis).
• Excessive lip licking, biting or sucking.
• Irritants such as those found in lipstick, lip balm, toothpaste or mouthwash (contact dermatitis).
• Loss of lip plasticity (hydration and elasticity), often due to age or exposure to hot, dry conditions.