Why is my four-year-old child always turning blue under his eyes? It seemed like a long time. It looks like there are dark circles under the eyes. What's going on?

Hello. There are many causes of blue circles, and your child may have the vascular type. This kind of child's blood vessels are superficial and show through the skin. In fact, this kind of child sleeps well and has no problems in other aspects. But when you look at the blue circles under the eyes, you feel that the child has not slept well or is in poor health. If it is the type I mentioned, it cannot be corrected. As long as the child's height and weight are normal and all physiological indicators are normal, there is no need to worry about blue eye circles.