Why does my almost 12 month old keep hitting his head on doors and walls on purpose? started when he got an ear infection. headache or ears hurting?

Gets your attention: What may have started as a response to an event may persist because it captures your attention. A 1yo will often be frustrated when you're not tending to their every want & even leaving them alone. Try monitoring baby without looking directly at him/her during episodes & only engage after the hitting stops.They do no long lasting harm but the fit can amplify if you always respond to it.