title: Pruritic hyperpigmented patch on back.
abstract: The location of the pruritic area on this patient's back and the darkened patch that followed helped us to identify the cause of her chronic discomfort.
authors.affiliation: Centro de Saúde Arnaldo Sampaio, Leiria, Portugal. Email: joanaseq@gmail.com.
authors.forename: Joana
authors.initials: J
authors.lastname: Sequeira
authors.affiliation: Unidade De Saúde Familiar Maria da Fonte, Póvoa de Lanhoso, Portugal.
authors.forename: Diogo
authors.initials: D
authors.lastname: Pereira
authors.affiliation: Unidade De Saúde Familiar Flôr de Sal, Aveiro, Portugal.
authors.forename: Cláudia
authors.initials: C
authors.lastname: Rainho
mesh_terms: D000287:Administration, Topical; D000368:Aged; D000982:Antipruritics / Q000008:administration & dosage; D001416:Back Pain / Q000188:drug therapy / Q000209:etiology; D002211:Capsaicin / Q000008:administration & dosage; D005260:Female; D006801:Humans; D009437:Neuralgia / Q000150:complications / Q000175:diagnosis* / Q000188:drug therapy; D010292:Paresthesia / Q000150:complications / Q000175:diagnosis* / Q000188:drug therapy; D011537:Pruritus / Q000150:complications / Q000175:diagnosis* / Q000188:drug therapy; D016896:Treatment Outcome
chemical_list: D000982:Antipruritics; D002211:Capsaicin