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