OnExam
- Urtication and erythematous halo are produced in response to rubbing or scratching of a lesion
- Seen in urticarial pigmentosa
- Named after the French dermatologist Darier who first described it
References
- Bickley L, Hoekelman R. Bates’ Guide to Physical Examination and History Taking. Philadephia, Pa: Lippincott; 2009.