T.D.
We were having the same type of problem with my 20 month old niece. As I have 3 teenagers I was sorta ready for this lol. When your daughter hits like that, immediately grab her hands (not real hard, just to stop them) get right to her level, look her in the eye and say "NO, that hurts" or "enough, that hurts"..something along those lines. The main thing, by holding her hands, you have her attention, by getting to her level, you're not talking down to her. At this age, short, quick and to the point is best. Something else we do, is the difference between owie and OW. Owie is playing..OW is that hurts. I hope this helps some :)