Causes of mental illness

Mental illnesses, in general, are thought to be caused by a variety of genetic and environmental factors:

  • Inherited traits. Mental illness is more common in people whose blood relatives also have a mental illness. 
  • Environmental exposures before birth. Exposure to environmental stressors, inflammatory conditions, toxins, alcohol or drugs while in the womb can sometimes be linked to mental illness.
  • Brain chemistry. Neurotransmitters are naturally occurring brain chemicals that carry signals to other parts of your brain and body. 

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