My four year old nephew has resently been diagnost with PDD and over the last 5-6 months he has been complaining of tingleing in his hands, legs and feet. It happens in the middle of the night and when he is just laying on the floor playing in my day care. He refers to this as "The sparkles". Can you tell me what you think? The primary doctor ran blood work and it showed nothing and they have an appointment to go to a specialtist at a larger hospital in August. I am just a concerned aunt and need some input as to what you think!!!