People with mental illnesses can lead normal lives, with proper treatment. Stigma, however, often prevents people from seeking the help they need.

Clarke Romans, executive director of the Southern Arizona chapter of the National Alliance on Mental Health, says the problem is awareness.

"It is all about awareness and removing the stigma so that we can talk about this biological brain disorder, like any other illness," Romans says.

Although new discoveries are helping to change the way people think about mental illness, Romans says too many individuals and their family members are afraid to seek out mental health services.