My nephew always shows signs of SOMETHING! i have no clue what it is... He's 5 years old now, and ever since he could sit up by hisself he's been behaving strangely.. He would bang his head on the floor, and try to bite and hurt others... He's never had a learning problem, he's intelligent, he talks very well... But for him to behave is extremely far fetched... and it is always a surprise if he does act good. Ever since he's been potty trained his played with his poop, either putting it on the walls or on his brother and sister... He has always tried to harm his siblings and his little cousins... And when he gets in trouble it just makes him madder, and act out more.. his mother refuses to get him evaluated because she doesn't, "believe" in mental disease... i think his problem stems farther from just add, or adhd.. He is very hyper of course... but he is just very mean, and doesn't like compassion.. he doesn't like to hug, or be hugged... he holds no sentimental value to anything.. he's very detached.. he has no close relationships with anyone, yet if he doesn't get attention he acts out, and purposely does bad things, as if to seek attention that way... whether it's positive or negative.. though he seems to do things to get negative attention, more then doing things to get positive attention... almost as though, he doesn't like positive attention... just today he peed on his little brother, and laughed even while he was getting in trouble.... my sister is going to lose her mind if something isn't done.. and i don't know how to convince her to get him seen about..