ADDer
There is no number. ADD is not harmful in anyway. unless you count short attention spans dangerous
A person who inflicts pain on themselves and others for attention may be exhibiting behavior consistent with a personality disorder, such as borderline personality disorder. It is important for them to seek professional help to address these harmful behaviors and underlying issues causing them to act out in this way.
attention seeker
Oppostional disorder
call them buddy, or jugs
Lonely
A person who seeks attention all the time can be referred to as an attention-seeker or attention-seeking individual.
Hypochondriac
attention wh@re is the phrase that was coined by Jesse Dawson
a photo freak / attention hog
give him the call me sigh, that will get his attention.
The person that suffered of mental disorder and hurts himself is called "self-injurer"