Is it a a bad character?

Hello, I'm a mom of a one year old boy. This past 2 months I have observed him hitting his head when he wants attention or when he doesn't get what he wants. Another observation is he puts his fingers inside his mouth until he almost vomits. Like what people do when they want to throw up. The first time I saw him putting his fingers inside his mouth when he was teething. He bites his fingers, I guess for relief but later on I noticed he puts his fingers to throw up. We were playing masakit ang ulo, every time he hears me masakit ang ulo, he puts his hand on his head. But I don't know what happened it turned into something violent, he hits his head with his hands even after I dismissed him from doing it by saying no, its bad. Please help. #firstbaby