Hallucinations are the states at which person perceives nonexistent objects as real. There are visual, auditory, olfactory, gustatory and tactile hallucinations. Auditoryhallucinations are most widespread. The person hears separate sounds, knocks, calls, talk. Voices happen silent and loud, familiar and unfamiliar, their content is unpleasant: voices threaten, abuse, promise to punish or do harm to the patient’s relatives. Auditory hallucinations often have ordering content and the person obeys to them.

Visual hallucinations are also various: from simple images of a flame, smoke, sparks to difficult situations, such as floods, fires, wars. They happen motionless and changing, as a movie. The content of hallucinations usually is unpleasant for patient.

Gustatory and olfactory hallucinations are more often shown together. Patients catch a smell of decay, pus, excrements, usual food seems disgusting.

Tactile hallucinations cause a discomfort in various parts of patients’ body. It seems to the patient that he is pinched, pricked.

There are pseudo hallucinations with complaints to voices in the head, not at distance.

It is important to distinguish hallucinations from illusions. For example, if it seems to person that the coat on the hanger has human outlines, it is illusion. But if the patient in empty space sees someone, or hears a voice though nobody is present nearby it is a hallucination. At illusions person easily agrees that he was mistaken, at hallucinations it isn’t possible to prove to the patient his wrongfulness. Illusions happen with healthy people also, hallucinations are signs of mental disease.

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