Many rehab programs in Trilla, Illinois address individuals with co-occurring mental and substance abuse disorders. A person who struggles with a psychological disorder(s) and substance abuse requires to work through both issues concurrently. Failing to address the client's mental disorder(s) during their drug rehabilitation will leave them vulnerable to relapse once they leave treatment. Difficulties with mood disorders, anxiety disorders and other psychiatric disorders (schizophrenia, personality disorders, etc.) will surface once back in their day to day life. If the person does not have a handle on how to control their mental disorder they will probably fall back into their old ways of abusing drugs or alcohol as a means of coping and self-medicating.