My 12months old baby girl like to bang her head on the ground ?

May be concerning: Head banging may be normal in children, especially if it happens consistently around bed time and if it does not cause them injury. It can, however, be a sign of more complex problems if it is associated with other delays, like not speaking or not walking by the right age. https://my.clevelandclinic.org/health/articles/14305-head-banging-and-body-rocking