is she only doing this out of frustration? i was told to walk away, do not react to it because this is what he wants (cause and effect). and it worked for us... now my son just started it again but he does not seem frustrated but happy instead... still ignoring it... but it is hard not to respond when he pulls out clumps of hair.

Hmm abby liked to Pinch my throat windpipe, i firmly each time gently took her hand and said No thats Ow till she got the point, she dont do it very often use Words like Ow or No ?