As the kidney
function of young children is not perfect, the body of water deficiency in children, there will be a lot of uric acid salts in the urine precipitate, that is, you see the "white particles in urine." This situation is particularly cold
season or early morning when the more common. When your child drink enough water, the "white particles in urine," would naturally not see, so you do not worry, this is a very common phenomenon, not sick.This should subside with time if its physiological.Hope this helps.Take care.