Dark circles under the eyes can indicate fatigue, but they have some surprising causes. Genetics is the main factor in the game, but freckles and blood is more prominent in the area.
Rarely, a nutritional deficiency of some kind "may play a role" in the appearance of dark circles. Make sure children eat a balanced diet and take a bottle of water to school every day to stay well hydrated. Keep the children's bedrooms free of mold and dust to minimize their allergies and to obtain a salt water spray that is helpful in cases of runny nose. If you have additional concerns Regarding their allergies, don't hesitate to take them to the family doctor. The bottom line is that dark circles are super common in children, and are rarely a cause for concern. Making sure the children get a good night's sleep is important, but keeping an eye on any hay fever or allergies is likely to be helpful. A suspected B12 deficiency or Iron will require a detailed examination with the doctor.