The Koebner phenomenon.
D002196:Capillaries / Q000473:pathology; D006801:Humans; D010812:Physical Stimulation; D011565:Psoriasis / Q000473:pathology*; D012867:Skin / Q000293:injuries* / Q000473:pathology; D012871:Skin Diseases / Q000473:pathology; D012882:Skin Tests; D013268:Stimulation, Chemical