I always had it when I was a kid. Obviously, it's called black-faced eczema. Doing laser in high school, my face is so thin that I have red blood. A few months later, I began to grow outside again. Later, I went to the doctor and said it was an endocrine problem. The laser just burned the surface. Later, my mother heard from other aunts that the plum blossom I bought for me was not in good shape, but it didn't grow new and was much lighter. Now you just need to do some isolation and sun protection when you go out.