Hello, I'm an expert in pediatric dermatology. Let's dive into the topic of Mongolian spots.

Mongolian spots are a common type of birthmark found in many infants, particularly in those of Asian, Hispanic, or African descent. These spots are characterized by flat, blue-gray patches of skin that are usually located on the lower back or buttocks, although they can appear anywhere on the body. They are caused by a concentration of pigment-producing cells (melanocytes) in the deeper layers of the skin.

Mongolian spots are harmless and typically fade as the child grows, often disappearing completely by the time the child is in school. There is no need for treatment unless the spots are in a location that causes discomfort or there is a cosmetic concern.

Now, let's translate this into Chinese:

你好，我是儿科皮肤科的专家。让我们深入了解一下蒙古斑这个话题。

蒙古斑是一种常见的婴儿胎记，尤其是在亚洲、西班牙裔或非洲血统的婴儿中。这些斑点的特点是平坦的蓝灰色皮肤斑块，通常位于下背部或臀部，尽管它们可以出现在身体的任何部位。它们是由皮肤深层中色素产生细胞（黑色素细胞）的集中引起的。

蒙古斑是无害的，随着孩子的成长通常会逐渐消退，通常在孩子上学时完全消失。除非斑点位于引起不适的位置或有美容方面的考虑，否则无需治疗。

read more >>

Mongolian spots are very common in any part of the body of dark-skinned babies. They are flat, gray-blue in color (almost looking like a bruise), and can be small or large. They are caused by some pigment that didn't make it to the top layer when baby's skin was being formed. ... Read more about newborn's skin and rashes.read more >>