My 10yr old daughter feels like the ground is moving beneath her

My 10yr old daughter constantly keeps feeling like the ground is moving beneath her. Also, she feels like she is going to fall over but she doesn't. Any ideas of what this is or why it is happening?

It sounds like she may have something going on in her "middle ear," where our sense of balance originates. If she has had a cold or sinus problems recently, that could be the cause. If it continues, I would have her see a doctor that specializes in ear, nose and throat issues. (Otolaryngologist).