Allergic contact dermatitis to triethanolamine in a child
Related Experiment Video
Updated: Apr 16, 2026

A Mouse Ear Model for Allergic Contact Dermatitis Evaluation
Published on: March 24, 2023
Nicola Milanesi1, Samantha Berti2, Massimo Gola1
1Allergological and Occupational Dermatology Unit, University of Florence, Florence, Italy.
Insights
Contact dermatitis to triethanolamine in cosmetics is rare in children. Patch testing is crucial for diagnosis, even in young patients, to identify specific allergens.
Area of Science:
- Dermatology
- Allergology
- Cosmetic Science
Background:
- Triethanolamine is a common emulsifier in cosmetics and topical medications.
- Contact dermatitis to triethanolamine is infrequently reported, especially in pediatric populations.
Observation:
- A case of a child presenting with suspected contact dermatitis to a cosmetic product is described.
- The rarity of childhood reactions to triethanolamine prompted a thorough diagnostic investigation.
Findings:
- Patch testing confirmed triethanolamine as the causative allergen.
- This case underscores that young age does not preclude allergic contact dermatitis to common cosmetic ingredients.
Implications:
- Pediatricians and dermatologists should consider patch testing for suspected cosmetic-induced dermatitis in children.
- Early and accurate diagnosis is essential for managing contact dermatitis and preventing future reactions.
- Further research into the prevalence and specific triggers of childhood contact dermatitis to cosmetic ingredients may be warranted.
Abstract:
Triethanolamine is used as an emulsifier in many cosmetics and in topical medications, yet the occurrence of contact dermatitis to cosmetics containing triethanolamine is rare in childhood. Our case highlights how young age should not be a deterrent to investigation and demonstrates the importance of patch testing with selected allergens.
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