Newborns with greenish-colored patches are considered to be caused by Mongolian spots and birth injuries. 1. Mongolian spots: often appear at the bottom of the waist and buttocks, are blue or blue-black pigmentation, generally called Mongolian blue spots, will not adversely affect the health, with the age of newborns, will gradually subside on their own. 2. Birth injury: it may be due to the long time of delivery, resulting in the body being squeezed, thus causing birth injury, which will often lead to localized skin bruises, but will gradually subside on its own. Newborns with green patches, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.