Injury of any kind can lead to death of pigment producing cells in the skin. This can lead to depigmentation. However this will not spread beyond the area of the injury. In fact in most cases there is spontaneous recovery. In those cases where this does not occur, some of the medicines used for treating vitiligo can be given. Generally the response is good. If new patches (of vitiligo) occur spontaneously, at some point later in life, one cannot say that injury was the cause of vitiligo. However, one can say that the patient had a tendency for vitiligo, which was precipitated at the site of injury and then developed at other sites in its due course of time.