Many treatment programs in East Peoria, Illinois address people with co-occurring mental and substance abuse disorders. A person who struggles with a psychological disorder(s) and substance abuse needs to work through both issues at the same time. Failing to handle the client's psychological disorder(s) during their drug rehabilitation will leave them susceptible to relapse once they leave treatment. Problems with mood disorders, anxiety disorders and other psychiatric disorders (schizophrenia, personality disorders, etc.) will come up once back in their day to day life. If the individual does not have a handle on how to handle their mental disorder they will likely fall back into their old ways of abusing drugs or alcohol as a means of coping and self-medicating.