adhd and bipolar mood disorder (bmd) can coexist or be mistaken for one another. bmd usually is not diagnosed until young adulthood. however studies have shown that the earlier a person is diagnosed with bmd the more likely he is to have been diagnosed with adhd previously. in this case i would just like to reiterate that there is not enough information to discuss either possibility for your son. you mentioned that he becomes hyperactive for 3 weeks but not what his behaviors are like during those 10 days. you also do not mention irritability or mood swings just adhd symptoms. keep documenting the symptoms you are concerned about including what goes on in the home and at school when you see changes in behavior (do you work those weeks does he visit a relative or have a different aide in the classroom). you also mentioned that this began 7 months ago. i would also urge you to think about what also might have changed in your son's life about that time. consulting your pediatrician or a child psychiatrist should help you unravel the mystery of your son's behavior.
my 5 1/2-year-old son displays adhd symptoms for 20 days then for 10 days he has none. is it adhd or another condition?