title: Lichen Planus Pigmentosus-like Reaction to Guasha.
abstract: OBJECTIVE
  Lichen planus pigmentosus (LPP) is an uncommon variant of lichen planus (LP) that manifests as macular hyperpigmentation involving chiefly the face and upper limbs. Although its etiology has not been fully elucidated, a relationship with hepatitis C infection, restrictive underwear, localized friction, and sun exposure have been proposed. Rarely, exposure to mustard oil, amla oil, henna, or hair dyes has been reported.
  
  
  CONCLUSIONS
  We herein describe an LPP-like reaction to Guasha.
authors.affiliation: Department of Dermatology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Yang
authors.affiliation: Department of Dermatology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China tancheng@medmail.com.cn.
authors.forename: Cheng
authors.initials: C
authors.lastname: Tan
mesh_terms: D000328:Adult; D006801:Humans; D017495:Hyperpigmentation / Q000209:etiology* / Q000473:pathology; D008010:Lichen Planus / Q000209:etiology* / Q000473:pathology; D008297:Male; D008516:Medicine, Chinese Traditional / Q000009:adverse effects*
keywords: Guasha; coining; hyperpigmentation; lichen planus pigmentosus