Mongolian spots are a type of birthmark. Most of them can fade or disappear naturally and can be treated with laser therapy. Mongolian spots are commonly found in yellow babies, which are present at birth, mostly on the buttocks and lumbosacral region, with smooth surface and light blue or blue-gray color. 1.No need to treat: most Mongolian spots can disappear naturally before the age of 5, and a few of them can last until adulthood, which has no adverse effect on the health of infants, so it is generally not necessary to treat them. 2. Laser treatment: If it does not subside for a long time, laser treatment can be taken, such as Q-switched laser, YAG laser and other measures. Patients who are willing to be treated can first go to regular hospitals for consultation, and decide the specific treatment measures under the guidance of specialized doctors.