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

  1. Bickley L, Hoekelman R. Bates’ Guide to Physical Examination and History Taking. Philadephia, Pa: Lippincott; 2009.