title: Dermatitis caused by physical irritants.
abstract: BACKGROUND
  Although physical irritant contact dermatitis (PICD) is a common occupational dermatosis, it is one of the least well understood because of its multiple types, lack of diagnostic test, and the many mechanisms involved in its production.
  
  
  OBJECTIVE
  To characterize the materials and mechanisms of physical irritation of the skin.
  
  
  METHODS
  We did a retrospective analysis over the past 20 years of all patients with a diagnosis of PICD at St John's Institute of Dermatology Contact Dermatitis Clinic.
  
  
  RESULTS
  Of the 29,000 patients who attended the clinic over the study period, 392 patients were diagnosed with PICD and of these, 335 files were analysed.
  
  
  CONCLUSIONS
  Our findings show that PICD accounted for 1.15% of all patients attending the contact clinic over the study period. Diverse occupations and materials were implicated. The most common cause of PICD was low humidity due to air-conditioning, which caused dermatitis of the face and neck in office workers due to drying out of the skin.
authors.affiliation: St John's Institute of Dermatology Contact Dermatitis Clinic, St Thomas' Hospital, Lambeth Palace Road, London SE1 7EH, UK. themojos@cwcom.net
authors.forename: R
authors.initials: R
authors.lastname: Morris-Jones
authors.forename: S J
authors.initials: SJ
authors.lastname: Robertson
authors.forename: J S
authors.initials: JS
authors.lastname: Ross
authors.forename: I R
authors.initials: IR
authors.lastname: White
authors.forename: J P
authors.initials: JP
authors.lastname: McFadden
authors.forename: R J G
authors.initials: RJ
authors.lastname: Rycroft
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000389:Air Conditioning / Q000009:adverse effects; D002648:Child; D002675:Child, Preschool; D003877:Dermatitis, Contact / Q000209:etiology*; D009783:Dermatitis, Occupational / Q000209:etiology*; D004391:Dust / Q000009:adverse effects; D005260:Female; D006230:Hand Injuries / Q000150:complications; D006310:Hearing Aids / Q000009:adverse effects; D006686:Hobbies; D006358:Hot Temperature / Q000009:adverse effects; D006801:Humans; D006813:Humidity; D007223:Infant; D007509:Irritants / Q000009:adverse effects*; D008297:Male; D008670:Metals / Q000009:adverse effects; D008875:Middle Aged; D010209:Paper; D010969:Plastics / Q000009:adverse effects; D019736:Prostheses and Implants / Q000009:adverse effects; D011481:Protective Clothing / Q000009:adverse effects; D012189:Retrospective Studies; D012408:Rubber / Q000009:adverse effects; D014934:Wood
chemical_list: D004391:Dust; D007509:Irritants; D008670:Metals; D010969:Plastics; D012408:Rubber