Hi,
My 10 month old is also very aggressive, he grabs at my face and throat, and yes it hurts, no matter how short I keep his nails! If I react or even raise my voice to be firm and say "NO" He thinks it is funny....I started putting him down if I am holding him, I tell him "NO" and then I turn away from him and ignore him. When I pick him back up a few minutes later, he goes for it again right away! He seems to be a bit HARD HEADED. I think it is going to take a bit more than scolding or ignoring him to get through. He was actually biting me every time he nursed, this went on for a week causing great anxiety for me. I finally did have to give him a little swat on the leg to get his attention, believe me after a week of having your NIPPLE bit, you have to do something to get their attention. Guess what? It worked he has not bitten me since...