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Firstly, avoid sun exposure to your child's face. Is he allergic to cow milk. He needs to eat more fresh fruits and vegetables in the diet to remove vitamin deficiencies which can also cause such problems. Let him be well hydrated. Dermatologist
should examine him as this dark circles
could be due to allergy
if he has, called Allergic shiners. He may be having scaly skin on the shins of his legs as well, kindly check. He needs to keep away from smoke, dust, pollen, allergic food. Better skin depigmentation
creams exist like Hydroquinone
but should be applied only when his Doctor prescribes.