A: While every one at some occasion has trouble staying still, sustaining attention, or holding back that impulsive urge. For those with ADD/HD the problem is so persistent and serious that it interferes with everyday life - work - friends & family life. the condition so severe and often debilitating that it has been recognised as a medical condition.
An often hidden disorder to the outsider, who is unable to see any physical defect; like those of physical or mental handicaps. But still this condition is no less traumatic on family life.
The problem not strictly speaking a deficit of attention so much as a lack of consistent direction & control, it may also be looked at as a lack of attention with regard to what others want them to pay attention to. Children with ADD are easily distracted and often seem to be daydreaming. They do not finish what they start and repeatedly make what appear to be careless mistakes. They haphazardly switch from one activity to another. Although their intelligence is normal, in many situations they find sustained mental effort an insurmountable challenge.
The most visible symptom - physical hyperactivity (may not
appear with isolated ADD) is often noticed in young children.
The disorder while given a generic classification is actually
subdivided into 3 categories, depending on whether it involves
mainly inattention, -- Hyperactivity and impulsiveness, -- or a
combination of both.