An auditory hallucination is the experience of "hearing voices" in your head when alone, or when no one is speaking. This is a common positive symptom of schizophrenia (remember, in schizophrenia positive doesn't mean 'good' it means something is present that shouldn't be there. Auditory hallucinations can also be a side effect of illegal drug use. These voices tend to be very negative in content and can be the source of what is referred to as "command hallucinations" which can give directions to commit violent acts such as committing homicide or suicide. This symptom can usually be controlled through the use of appropriate medication. Unfortunately, many people who suffer from schizophrenia are frequently loathe to use medications and it is sometimes difficult to keep schizophrenics on their proper medication.