Many rehabilitation programs in Tremont, Illinois address persons with co-occurring mental and substance abuse disorders. A client who struggles with a psychological disorder(s) and substance abuse requires to work through both issues simultaneously. Failing to deal with the client's mental disorder(s) during their drug rehabilitation will leave them susceptible to relapse once they leave treatment. Problems with mood disorders, anxiety disorders and other mental disorders (schizophrenia, personality disorders, etc.) will surface once back in their day to day life. If the individual does not have a grip on how to control 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.