Why do auditory hallucinations happen?

There are a number of reasons why auditory hallucinations may occur. One possibility is that they could be due to a mental health condition such as schizophrenia. Another possibility is that they could be caused by Hearing voices in one's head: Causes, treatments, and outlook hearing voices or other sounds that are not actually present.

Auditory hallucinations are more likely to occur if someone is sleep deprived, under a lot of stress, or taking certain medications (such as antipsychotics). Alcohol and drug abuse can also lead to auditory hallucinations.