Dizziness is the feeling of being lightheaded, woozy, or unbalanced. It affects the sensory organs, specifically the eyes and ears, so it can sometimes cause fainting. Dizziness isn’t a disease, but rather a symptom of various disorders. Vertigo and disequilibrium may cause a feeling of dizziness, but those two terms describe different symptoms. Vertigo is characterized by a spinning sensation, like the room is moving. It may also feel like motion sickness or as if you’re leaning to one side. Disequilibrium is a loss of balance or equilibrium. True dizziness is the feeling of lightheadedness or nearly fainting. Dizziness is common and its underlying cause usually isn’t serious. Occasional dizziness is not something to worry about. However, you should call your doctor immediately if you’re experiencing repeated episodes of dizziness for no apparent reason or for a prolonged period.