Dizziness can usually be more specifically described as one of the following sensations:
The false sense of motion or spinning (vertigo)
Lightheadedness or the feeling of near fainting
Loss of balance or unsteadiness (disequilibrium)
Other sensations such as floating, swimming or heavy-headedness
A number of underlying health conditions can cause these problems. Some of these conditions disrupt or confuse the signals your brain receives from one or more of your sensory systems, including your:
Eyes, which help you determine where your body is in space and how it's moving
Sensory nerves, which send messages to your brain about body movements and positions
Inner ear, which houses sensors that help detect gravity and back-and-forth motion