hi i understand your concern dizziness in morning and few other times. few tests need to be done- BP of the child, vision testing, fundus examination, hemogram, these are few baseline tests . possible causes- anaemia, poor vision, hypertension. these need to be ruled out. DM presenting like this is unlikely. frequent urination check how thirsty he is ? how much water he drinks? if he is dehydrated? this could lead to dizziness get all these tests done let me know the results take care