It is quite common for people who are afflicted with a mental health issue to also be plagued by a co-occurring substance abuse issue. In truth, it is more prevalent than one would assume and a lot of people currently in drug treatment centers in Walnut, Illinois may have mental health disorders which have just simply been undiagnosed. Treatment experts at proven drug rehabilitation programs in Walnut, Illinois know how to identify individuals with co-occurring psychological and drug and alcohol abuse issues so that both concerns can be simultaneously addressed while the person is in treatment. Simply because both need to be addressed, the individual should not leave rehabilitation until they are psychologically stable, not just sober.