This article is from the Bipolar Disorder FAQ, by barry@webveranda.com (Barry Campbell) with numerous contributions by others.
Hallucinations may occur in any of the senses: auditory (for example, hearing
voices or music), gustatory (for example, unpleasant tastes), olfactory (for
example, unpleasant smells), somatic (for example, a feeling of "electricity"),
tactile (for example, a sensation of being touched, or "skin crawling"
sensations), visual (for example, flashes of light, colors, images on the
periphery).
 
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