An exacerbation of psoriasis may be triggered by a number of factors. The occurrence of lesions at the site of trauma is termed Koebner's phenomenon.
Dermatologic condition:
(1) dermatitis
(2) lichen planus
(3) pityriasis rosea
(4) vitiligo
Drugs:
(1) lithium
(2) beta-blockers
(3) ACE inhibitors
(4) withdrawal of steroid therapy
(5) withdrawal of immunosuppressive therapy
Environmental factors:
(1) exposure to cold
(2) burn (thermal or chemical)
(3) skin irritant
(4) photosensitivity
(5) electric shock
Infection:
(1) Group A beta hemolytic streptococcus
(2) HIV infection
(3) chickenpox or shingles (Herpes zoster)
(4) furuncles
Physical trauma:
(1) abrasion, scrape, scratch or laceration
(2) bite
(3) acupuncture
(4) tattoos
(5) skin test or vaccination
(6) removal of tape
(7) incision or surgical site
(8) shaving
(9) pressure
(10) rubbing or excoriation
(11) contusion or blunt injury
Psychological:
(1) stress
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Specialty: Dermatology, Immunology/Rheumatology
ICD-10: ,
