Dr Ethan has provided a good summary on the possible causes of vertigo. Vertigo is a type of giddiness whereby a patient feels that the room is spinning or he/she is spinning. If this is what you experience, then you should see an ENT Specialist first.
Most vertigo are due to peripheral causes (meaning there is a problem with the balancing system of the ear).
Central causes of vertigo (due to a problem in the brain) are fortunately much rarer. Warning symptoms associated with central vertigo include feeling like you are losing consciousness, difficulty in swallowing, slurring in your speech, and weakness in your arms/legs and double vision.
If your vertigo is associated with these symptoms, you need to see a neurologist first.
