Can a small tumor in cerebellum cause dizzy head laying down for a few minutes? or are there usually more neurological symptoms?

Brain tumor: Yes. Even small tumors in strategic locations can cause neurological symptoms. Acoustic neuromas (vestibular schwannomas), meningiomas, and hemagioblastomas are some of the tumors that arise in and around the cerebellum that can cause dizziness. A history and physical examination with a neurosurgeon can determine whether the tumor and symptoms are linked.