Balance problems can make you feel dizzy, as if the room is spinning, unsteady, or lightheaded. You might feel that you're going to fall down. These feelings can happen whether you're lying down, sitting or standing.
Many body systems including your muscles, bones, joints, vision, the balance organ in the inner ear, nerves, heart and blood vessels must work normally for you to have normal balance. When these systems aren't functioning well, you can experience balance problems.
Many medical conditions can cause balance problems. However, most balance problems result from issues in your balance end-organ in the inner ear (vestibular system).