What is this white patch of skin on the baby’s chest?

The white patch of skin on the baby’s chest may be related to pityriasis alba, or may be related to vitiligo and other factors.
1. white furfur: white furfura mostly appear in the face and chest, and will present oval as well as round spots of varying sizes, white furfura can subside on its own in the later stage, so mild spots do not need special treatment.
2. Vitiligo: Vitiligo actually belongs to a relatively common pigmented skin disease, mainly characterized by white spots, vitiligo is mainly a reduction in the number of melanocytes in the skin, or even the disappearance of the situation leads to, the specific mechanism is not clear.
The baby chest skin white piece, there may be other aspects of the cause, it is recommended to timely to the hospital for relevant examination, clear cause after active symptomatic treatment.