My son continually slaps himself in the face when he gets upset. He is 4 and has Pervasive Developmental Disorder (PDD) not otherwise specified, anxiety, ADHD, Obsessive Compulsive Disorder (OCD). I know it's because he doesn't know how to express his frustrations and anger, but watching slap himself repeatedly just breaks my heart. Last night he did it many times in front of a lot of extended family. I just removed him to another room and was able to talk to him and have him tell me what upset him. I've tried encouraging him to hit his stuffed animals or pillows, but he is afraid if he does that to his "pets" (stuffed animals) that they will turn real. Has anyone had any experience with this stimulant? what other options can i give him to express his frustration? he can't even tell me that he is upset; he just starts slapping himself...every time it happens i just want to start crying, but i hold that in.