It is not uncommon for individuals who are afflicted with a psychological issue to also struggle with a co-occurring alcohol and drug abuse disorder. In fact, it is more common than one would imagine and many individuals currently in drug and alcohol rehabilitation programs in Hollister, California may have mental health issues which have just simply been undiagnosed. Rehab professionals at successful drug and alcohol rehab facilities in Hollister know how to identify persons with co-occurring mental and drug and alcohol abuse disorders so that both issues can be simultaneously addressed while the person is in rehab. Because both must be resolved, the client should not leave treatment until they are mentally stable, not just sober.