My three years old son displays very aggressive behavior

[Manda1030]

We have a beautiful three year old. He got lead poisoning when he was two. His levels didn't return to normal for 1 year. Now he has extreme aggressive behavior. He pinches hard enough to leave bruises. He hits and punches everyone. He picks up toys and other objects and hits with them. He hits our dog. ( and she is a big dog, but sweet as a teddy bear.) He throws things. Screams a lot. Says things like " I'm going to kill you". I really worry for him. He's an extremely smart little boy and I'm not just saying that because I am his mom he really is. He can also be very loving and loves to hug. I've tried time out and taking things away from him. I have even tried swatting but I really don't like to do that!! I have sat down with him and tried to talk to him about why he does these things. And how he feels when he is doing them but all he said is because I am angry. He always wakes up crying. He has a  really hard time sleeping and staying a sleep. He growls at everybody who says "hi" to him. I can't put him in pre- school right now with his anger how it is. I'm afraid he would hurt someone else's child. I am constantly getting on him for picking on his 6 year old cousin. And he scares me around the 6 month old. Yet he is so lonely and doesn't understand why his cousin doesn't want to play with him. I've tried to explain that you have to play nice. Nothing seems to help and some days I just feel like crying. I'm at a loss and just do not know what to do anymore. I love my son so very much and so desperately want to help him. He is just like a huge ball of energy!

[isthiscp]

Hi I just thought I'd reply.Hope this is helpful but I am sure I have read somewhere that lead poisoning can be related to autism. Maybe you could post your ? on the autism forum or google lead poisoning and autism. Hope that is useful!