Vertigo is a balance disorder. It can result in dizziness as well as a feeling of nausea and sometimes even vomiting. Vertigo is classified as either central or peripheral. Central vertigo can be due to multiple sclerosis. It can also be a result of migraine headaches. It can arise as a result of a problem in the balance center of the brain. Examples of peripheral vertigo are--motion sickness, inner ear infections which can trigger vertigo, problems with the vestibular system, or Meniere's disease. Bacterial or viral infections in the inner ear can upset the fluids inside triggering episodes of vertigo. Stress, anxiety or extensive travel on boats can all result in episodes of dizziness and vertigo. It can also result from traumatic brain injury.