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Summary
Lip acne, a rare form of acne, can develop from applying products like Chap Stick or petroleum jelly. This condition, characterized by open comedones on the upper lip, resolves after discontinuing product use and undergoing comedone expression.
Area of Science:
- Dermatology
- Cutaneous Medicine
- Acne Pathogenesis
Background:
- Acne vulgaris is a common pilosebaceous unit disorder.
- Limited or unusual presentations of acne require specific diagnostic considerations.
- The role of external agents in acne development is an area of ongoing research.
Observation:
- Two patients presented with a distinctive acneiform eruption.
- The eruption manifested as a single linear row of large, open comedones.
- Lesions were exclusively located along the cutaneous margin of the upper lip.
Findings:
- Acne onset correlated with the repetitive application of lip products: Chap Stick (containing petrolatum) in one patient and petroleum jelly (Vaseline) in the other.
- Histological examination revealed open comedones as the primary lesion.
- Cessation of the offending lip product, combined with microincision and expression of comedones, led to successful resolution.
Implications:
- Petrolatum, a common ingredient in lip balms and emollients, may act as a comedogenic agent in susceptible individuals.
- This case series highlights a specific etiology for localized upper lip acne.
- Clinicians should consider topical lip product use in the differential diagnosis of unusual acne presentations.