K.K.
K.,
Before I answer I want to give you a bit of my background so that you understand where I'm coming from. I am a Chiropractor that is working toward a certification in pediatrics. I have finished all of the necessary course work and now just have to finish the exam to be certified. It is very common for young children to bang their heads, but not "normal". Head banging is a very strong indicator that your child has a subluxation (malposition) of her skull or on of the vertebrae in her neck. I would strongly recommend that she see a chiropractor ASAP. You can locate a pediatric chiropractor in your area on the following website:
www.icpa4kids.org.
If you have anymore questions please contact me.
Dr. K. K.