There are five types of hallucinations. Each one is related to one of the five senses. These include: auditory hallucinations (hearing voices and other sounds that aren’t there), visual hallucinations (seeing things that aren’t there), tactile hallucinations (having the sensation of someone or something touching you), olfactory hallucinations (smelling odors that aren’t there), and gustatory hallucinations (having a taste in the mouth that has no source).