my 4 year old son wont sleep . when i put him to bed he will sleep for 2 -3 hour and he will wake up and he wont go back to sleep . i have 2 other children that sleep through the night . there is no tv in his bedroom and i have try everything i can thing off . my son will wake up at 12.00am and he won go back to sleep and he always doing this . i ask him whats wrong and he just say nothing . we got a appoinment with a paediatrics. we got a good pattan through out the day and at bed time . my son getting bad head due to the face of him not sleeping . i really don know what to do now we are very worry .