It is quite common for men and women who are afflicted with a mental health disorder to also have a co-occurring substance abuse disorder. In fact, it is more widespread than one would think and a lot of people currently in drug rehabilitation facilities in Twain Harte, California may have psychological issues which are often undiagnosed. Rehab experts at effective drug treatment facilities in Twain Harte know how to spot persons with co-occurring psychological and substance abuse issues so that these two concerns can be handled simultaneously while the person is in rehabilitation. Because both must be resolved, the client should not leave rehabilitation until they are psychologically stable, not just sober.