text: The phenomenon of hearing voices inside the head, which others cannot, can be categorized as a common form of auditory hallucination. Hallucination is the perception or sensation of voices that can be heard by a person when they are awake and gives the feeling of being real.
  These are nothing but illusions created by the brain. People with auditory hallucinations tend to hear sounds they are familiar with and sometimes also hear unusual noises. The sound or voice a person hears may be frightening or pleasant.
  Types of voices heard
  The types of voices heard can vary depending on the severity of the psychiatric condition in a person. They may include:
  Voice of someone calling their name when no one is around them.
  Hearing mild voices when falling asleep.
  Constant occurrence of hearing voices inside the head.
  The feel of hearing voices outside, but soon recognize it as that heard from inside the ears.
  Thoughts of hearing other persons’ thoughts or feelings as if other people might hear your thoughts.
  Scary voices that command you to attempt dangerous things or to control your behavior.
  Friendly voices that direct you to do inappropriate things.
  Hearing voices that are supportive and helpful.
  Hearing two or more voices arguing or fighting inside the head.
  It is important to recognize that not all voices are negative or as a result of mental disorder. Hearing voices is much more common than many people realize, and sometimes they have positive effects. Whilst negative voices that are affecting a person’s well-being can require treatment, this is not always the case for positive voices and some people can live with them.
  Causes of voices
  Many significant factors can cause hearing voices. The major factors that contribute to this condition are stress, anxiety, depression, and traumatic experiences. In some cases, there might be environmental and genetic factors that cause such hearing of voices.
  The brain of the patient generates the voices and sounds, and they tend to hear both sounds simultaneously. The condition becomes severe when the patient fails to understand that they are hearing their voice.
  In recent studies, researchers have analyzed the occurrence of auditory hallucinations in the human brain. The basic form of hearing is processed in the temporal lobe of the brain. This part of the brain is found inside the ears. The research concluded that a particular region of the left temporal lobe is more active in auditory hallucination compared to non-hallucinating people.
  Several possible causes may cause people to hear voices, including:
  Traumatic incidents – Hearing voices might be the result of a traumatic incident that occurred in the early life of the patient while hearing one or more voices might be a result of his experiencing a disassociate disorder.
  Assault or Abuse – When a person is abused or assaulted, the voice or images of the abuser come in flashes.
  Sleeplessness – Lack of sleep might also cause hearing voices, though this is not experienced in daily life.
  Result of Drugs – People may hear voices as a side effect of some medication or drugs. For some people, these voices can be heard when they are being relieved from certain medical courses.
  Death of a loved one – This can occur when a person loses someone very close to their heart. Unable to tolerate their loss, they hallucinate about the dead person calling or speaking to them.
  Voices in sleep – These voices can occur before or after sleep, as the mind is dreaming. These voices vanish when fully awake.
  Auditory hallucination is a condition that presents as a symptom for people suffering from schizophrenia.
  Schizophrenia is a severe chronic mental disorder and can affect a person’s feelings, thoughts, and behaviors. Schizophrenia sufferers are reported to lose touch with their real lives. Although it is not as common as other mental disorders, the symptoms can be very debilitating for those who are affected.
  People with schizophrenia tend to feel things that are not present and hear voices that do not exist. The affected person often believes that his thoughts can be read and controlled by others. This kind of strange occurrence can make patients feel upset, or make the real world seem scary to them. The behavior of people with schizophrenia might be threatening or cause harm to the people around them in some cases.
  Affected individuals usually think and communicate strange thoughts and ideas making it difficult for other people to continue a conversation. They can sit idly for hours without making any movements.
  In schizophrenia, the voices the people hear may be internal or external. Internal voices are those that a person hears inside his mind, while external voices project as if another person is before them and is talking to them. Sometimes the sufferers talk back to the voices to stop it from recurring. However, this often makes the voices stronger and increases the frequency of occurrence of hearing voices.
  There is a theory that auditory hallucinations in schizophrenia are a result of the dopamine hypothesis, changes to the levels of the dopamine and serotonin neurotransmitters which some argue is the biological basis of schizophrenia.
  People with schizophrenia often find it difficult to go to work or care for themselves and depend on others for their daily living needs.