What is Koebner's phenomenon is characteristic of – and explain in detail?
Disorders showing koebner's phenomenon

Lichen planus           Lichen nitidus                         Darrier disease (Keratosis follicularis)
Psoriasis                   Molluscum contigiosum          DLE
Vitiligo                       Warts                                      Pityriasis rubra pilaris

Rare causes are

Erythema multiforme                                          Necrobiosis lipoidica
Hailey-bailey disease                                         Xanthoma
Leukemia & Carcinoma                                      Vasculitis
Lichen sclerosis