11month old shaking her head

Lauren • Sienna Olivia 20/01/2019 💗 Mason George 17/05/2020 💙

My 11month old keeps randomly shaking he head from side to side quite fast no routine with it just randomly it she started doing it a few weeks ago.. anyone else’s kids do this is it something she’s learnt or you think I should get it checked she’s constantly teething and had a couple of ear infections in last few months ?