My Son Always Has Dark Purple Circles Under His Eyes, I Know This Is Not Normal. What Tests Should I Ask To Be Done. He Also Has A Dx Of Von Willebrand Disease?

The dark circle around the eyes are due to the sleeping disorders in your son. It is also possible that your son has got some other infection with these sleeping disorders. It means that your son is not taking proper sleep and his sleeping duration is not according to his requirement. And due to this, he is suffering from the problem you've mentioned in your question.
You should contact to psychologists if he has some psychological problem with his sleep. And in another case you should ask doctors to check his eyes and especially they should not neglect the possibility of ectropion, entropion, dermatochalasis, and other eye-related diseases.

I have the same issue and I am a 13 year old girl. Even when I get a good night sleep I still have them. My neighbor who is a nurse says to get more iron into my system and so far it has helped, try taking a daily vitamin.